Cookie Notice
Last updated: October 2026
Thank you for visiting www.nejm.org and the other websites, applications, programs and services operated by NEJM Group, a division of the Massachusetts Medical Society ("MMS", "NEJM Group", "we", "our" or "us") (collectively, the "Services").
We place small text files called cookies and use other similar technologies, such as local storage, authentication tokens and scripts, on your device (together, “cookies”). This Cookie Notice explains how cookies are used on the site and how you can control them. Cookies may be placed by us or by third parties whose services we use. Cookies may also collect Personal Data, such as your IP address, device and browser information and information about how you use the site. Please see our Privacy Policy for information about how we process Personal Data.
What are cookies?
Cookies are small files of letters and numbers that are stored on your browser or device. They can collect information about how you use a website, the device and browser you use, the pages and content you view, the actions you take and the time and duration of your visit.
Cookies can be classified according to the purpose they serve, how long they remain on your device and whether they are placed by the website itself or by a third party.
| Purpose | Duration | Provenance |
| Required cookies: necessary to enable the basic features of the Services, such as secure log-in, account access, transaction support, site security and recording cookie choices. | Session cookies: temporary and expire when you close your browser, log out or the session ends. | First-party cookies: placed directly by the website you are visiting. |
| Functional: used to analyze use of the Services, evaluate and improve performance, remember choices and provide enhanced functionality or a better customer experience. | Persistent cookies: remain on your device until they expire or are deleted by you or your browser. | Third-party cookies: placed by a third-party service used by the website. |
| Advertising Cookies: used to show more relevant advertising, measure advertising campaigns, understand interests and support social sharing or advertising-related features. |
What types of Cookies We Use and Why?
We currently use cookies for the purposes described below.
(1) Required Cookies: These cookies and similar technologies are required for the site to operate, to create and maintain secure user sessions and to enable account authentication. They cannot be switched off through the cookie banner where they are strictly necessary to provide a service requested by you.
List of required cookies and technologies:
| Company / provider | Domain(s) | Purpose | Type |
| Adobe Fonts (formerly Type Kit) | use.typekit.net | Supports font delivery and display of web fonts used by the Services. | Third party |
| akamai | quilt-cdn.janrain.com; ssl-cdn.janraincapture.com; ssl-widget-cdn.rpxnow.com | Supports cloud/CDN, identity-widget and security-related delivery for site operation. | Third party |
| Google Inc. | csi.gstatic.com; maps.gstatic.com; www.googletagmanager.com; www.gstatic.com | Supports Google-hosted scripts, maps, tag management and static resources needed for site functionality. | Third party |
| Massachusetts Medical Society | alliance.massmed.org; community.massmed.org; massmed.org; portal.massmed.org; www.massmed.org | Supports MMS-operated services, account access, portals and related site functionality. | First party / affiliate |
| NEJM - New England Journal of Medicine | at.nejm.org; bc.nejm.org; clinician.nejm.org; cssjs.nejm.org; media-assets.nejm.org; myaccount.nejm.org; nejm.org | Supports NEJM-operated domains, account features, content delivery and site assets. | First party / affiliate |
| NEJM Group | nejmgroup.org; www.nejmgroup.org | Supports NEJM Group-operated domains and related service functionality. | First party / affiliate |
| TrustArc | consent.trustarc.com | Supports the cookie preference centre and records users' cookie choices. | Third party service provider |
(2) Functional Cookies: These cookies allow us to analyse use of the Services, evaluate and improve performance, provide enhanced functionality and deliver a better customer experience. For example, they may remember log-in details, support shopping-cart or account features, and provide us with information about how the Services are used. Where required by applicable law, we will only use non-essential functional, analytics or performance cookies if you have consented to them through the cookie preference tool.
List of functional cookies and technologies:
| Company / provider | Domain(s) | Purpose | Type |
| Adobe Audience Manager, Adobe Experience Cloud | demdex.net; dpm.demdex.net; mmsnqaa.sc.omtrdc.net | Supports audience management, segmentation, analytics and digital experience measurement. | Third party |
| Adobe Fonts (formerly Type Kit) | p.typekit.net | Supports web font delivery and related font-service functionality. | Third party |
| Adobe Inc. | assets.adobedtm.com | Supports Adobe tag-management, digital marketing and measurement tools. | Third party |
| Amazon (Cloudfront) | *.cloudfront.net | Content delivery network used to deliver data, videos, applications and APIs with low latency. | Third party |
| Amazon (Web Services) | higherlogicdownload.s3.amazonaws.com; s3.amazonaws.com | Cloud storage and download infrastructure used to support site and community features. | Third party |
| BlueConic | mms.blueconic.net; mms.sb.blueconic.net | Customer data platform used for recognition, engagement, personalisation and analytics. | Third party |
| Cloudflare | cdnjs.cloudflare.com | Web performance, security and library/CDN delivery services. | Third party |
| DoubleVerify Inc. | cdn.doubleverify.com | Media verification, campaign effectiveness and quality measurement services. | Third party |
| Edgio (formerly Edgecast) | cf.cdn.uplynk.com; content.uplynk.com; media.fa.cdn.uplynk.com | Content delivery network used for digital media content and software delivery. | Third party |
| Google Inc. | ajax.googleapis.com; analytics.google.com; ep1.adtrafficquality.google; ep2.adtrafficquality.google; google.com; maps.googleapis.com; region1.analytics.google.com; region1.google-analytics.com; ssl.google-analytics.com; www.google-analytics.com; www.google.com; www.googletagmanager.com | Supports analytics, maps, tag management, ad-traffic quality and Google-hosted resources. | Third party |
| Higher Logic | api.connectedcommunity.org | Supports online community, engagement and marketing automation functionality. | Third party |
| JWP, Inc. | cdn.jwplayer.com; ssl.p.jwpcdn.com | Supports embedded video player functionality and video delivery. | Third party |
| Microsoft | ajax.aspnetcdn.com | Supports Microsoft-hosted scripts and software resources. | Third party |
| NEJM - New England Journal of Medicine | bc.nejm-dev.org; bc.nejm-qa.org; fonts.nejmgroup-dev.org | NEJM-related domains listed in the Cookie Preference Centre for functionality and font resources. | First party / affiliate |
| NEJM Career Center | apps1.nejmcareercenter.org | Supports NEJM CareerCenter features, including employment resources, job alerts and search functionality. | First party / affiliate |
| Neustar Inc., a TransUnion company | agkn.com; d.agkn.com | Marketing analytics and information services used to support insights and decision-making. | Third party |
| New Relic Inc. | bam.nr-data.net; js-agent.newrelic.com; nr-data.net | Software analytics and application performance monitoring. | Third party |
| Nielsen International SA | imrworldwide.com | Performance measurement and audience/consumer understanding services. | Third party |
| Volentio JSD Limited | cdn.jsdelivr.net | jsDelivr open-source CDN used for performance, reliability and security. | Third party |
(3) Advertising Cookies: These cookies are used to show ads that are more relevant to you, measure and improve advertising campaigns, better understand interests and support social networking or sharing features. Where required by applicable law, we will only use advertising cookies if you have consented to them through the cookie preference tool.
| Company / provider | Domain(s) listed in cookie preference tool | Purpose | Type |
| Adobe Audience Manager, Adobe Experience Cloud | dpm.demdex.net | Supports audience profile building, segmentation and use of audiences across digital channels. | Third party |
| BlueConic | plugins.blueconic.net | Customer data platform used for recognition, engagement and marketing ecosystem synchronisation. | Third party |
| DoubleVerify Inc. | rtb0.doubleverify.com; rtbc-ue1.doubleverify.com; tps-c-ue1.doubleverify.com; tps.doubleverify.com | Online media verification, campaign effectiveness and advertising quality measurement. | Third party |
| Google Advertising Products | doubleclick.net; pagead2.googlesyndication.com; s0.2mdn.net; securepubads.doubleclick.net; static.doubleclick.net; stats.g.doubleclick.net; tpc.googlesyndication.com; www.youtube.com; youtube.com | Supports Google advertising, ad delivery, ad measurement, DoubleClick, Google ad network and YouTube-related advertising resources. | Third party |
| Google Inc. | i.ytimg.com | Supports Google/YouTube image and media resources used in connection with advertising or embedded media. | Third party |
| Index Exchange Inc. | casalemedia.com | Ad exchange technology enabling programmatic sale and measurement of ad impressions. | Third party |
| JWP, Inc. | assets-jpcust.jwpsrv.com; content.jwplatform.com; videos-cloudfront.jwpsrv.com | Supports video player, hosted video content and related advertising/media functionality. | Third party |
| linkedin.com; px.ads.linkedin.com; snap.licdn.com; www.linkedin.com | Supports LinkedIn social networking, advertising, campaign measurement and related features. | Third party | |
| Magnite, Inc. | rubiconproject.com | Sell-side advertising platform used in connection with advertising inventory and campaigns. | Third party |
| Meta (formerly Facebook) | connect.facebook.net; www.facebook.com | Supports Facebook/Meta social, advertising and related connection features. | Third party |
| Tapad, Inc. | tapad.com | Cross-platform advertising technology used to address media consumption across devices. | Third party |
| The Trade Desk, Inc. | adsrvr.org | Demand-side platform used for digital media buying and advertising delivery. | Third party |
| X (formerly Twitter) | abs.twimg.com; platform.twitter.com; syndication.twitter.com | Supports X/Twitter social networking, platform and syndication functionality. | Third party |
| Xandr, Inc. | adnxs.com | Audience-based advertising technology used for ad targeting and delivery. | Third party |
How can I set up my cookies’ preferences?
When you visit the or use our online Services, the cookie banner or cookie preference tool allows you to manage your cookie choices. Depending on your location and the Service you use, you may be able to accept all cookies, decline all non-essential cookies, or make choices by category, including Functional Cookies and Advertising Cookies.
Required cookies are used by default because they are necessary for the Services to operate or to provide features you request. Non-essential cookies, including functional cookies and advertising cookies, are used only where permitted by applicable law and, where required, after you have given consent.
You can change or withdraw your cookie choices at any time by using the Cookie Preferences cookie preference tool made available on the relevant Service. Withdrawing consent will not affect the lawfulness of any processing carried out before withdrawal.
You can also use your browser settings to block or delete cookies. The method differs between browsers, so please consult your browser's help or settings menu. Blocking all cookies may prevent you from logging in or using some features of the Services correctly.
Do Not Track and other browser signals
Some browsers offer a "Do Not Track" signal. The Services may not respond to all Do Not Track signals. This does not affect the cookie choices available through the cookie preference tool.
Changes to this Cookie Notice
We may update this Cookie Notice from time to time to reflect changes in the cookies and similar technologies used on the Services, changes in law or changes in our business. We will indicate that the Cookie Notice has been updated by changing the "Last updated" date above.
Contact
If you have any questions about the way we use cookies, please contact our Data Protection Officer using the details below.
Email:
dpo@mms.org
Post:
NEJM Group
Attn: Data Protection Officer
Massachusetts Medical Society
860 Winter Street
Waltham, MA 02451 USA
EU representative:
Rickert Rechtsanwaltsgesellschaft mbH - MMS, Colmantstraße 15, 53115 Bonn, Germany; art-27-rep-mms@rickert.law.
UK representative:
Rickert Services Ltd UK - MMS, PO Box 1487, Peterborough, PE1 9XX, United Kingdom; art-27-rep-mms@rickert-services.uk.