{"apiKey":"00bb5a8636ce078521a026ac4324933b5671a7ee","product":"PRO","logConsent":false,"consentCookieExpiry":"365","encodeCookie":false,"subDomains":true,"notifyOnce":false,"rejectButton":false,"toggleType":"slider","closeStyle":"button","settingsStyle":"button","initialState":"OPEN","layout":"SLIDEOUT","position":"LEFT","theme":"LIGHT","necessaryCookies":["all-networks","CookieConsent","Drupal.visitors.comment_sort","local_storage_support_test","pa","pa_enabled","SimpleSAMLAuthToken","SSESS#"],"optionalCookies":[{"name":"Marketing","label":"Marketing cookies","description":"

These cookies are used to deliver relevant marketing messages to you based on the web pages you visit and your preferences.

\r\n","cookies":["_gads"," ads/ga-audiences"," GPS"," i/jot"," IDE"," sp_landing"," sp_t"," test_cookie"," _fbp"],"onAccept":"function(){dataLayer.push({\r\n 'event': 'marketing_consent_given',\r\n 'marketing_consent': true\r\n});}","onRevoke":"function(){dataLayer.push({\r\n 'event': 'block_marketing_cookies',\r\n 'marketing_consent': false\r\n});}","recommendedState":true,"lawfulBasis":"consent"},{"name":"Preference","label":"Preference cookies","description":"

These cookies allow your preferences to be stored for Youtube videos on our site and Twitter sharing functionality.

\r\n","cookies":["personalization_id"," __widgetsettings"," VISITOR_INFO1_LIVE"," yt-remote-cast-installed"," yt-remote-connected-devices"," yt-remote-device-id"," yt-remote-fast-check-period"," yt-remote-session-app"," yt-remote-session-name"," yt-remote-connected-devices"],"onAccept":"function(){ dataLayer.push({\r\n 'event': 'preference_consent_given',\r\n 'preference_consent': true\r\n});}","onRevoke":"function(){dataLayer.push({\r\n 'event': 'block_preference_cookies',\r\n 'preference_consent': false\r\n});}","recommendedState":true,"lawfulBasis":"consent"},{"name":"Statistics","label":"Statistics cookies","description":"

We'd like to set statistics cookies to help us to improve our website by collecting and reporting information on how you use it. The cookies collect information in a way that does not directly identify anyone. For more information on how these cookies work, please see our 'Cookies page'.

\r\n","cookies":["_ga"," _gat"," _gid"," collect"," vuid"," YSC"],"onAccept":"function(){dataLayer.push({\r\n 'event': 'statistics_consent_given',\r\n 'statistics_consent': true\r\n});}","onRevoke":"function(){dataLayer.push({\r\n 'event': 'block_statistics_cookies',\r\n 'statistics_consent': false\r\n});}","recommendedState":true,"lawfulBasis":"consent","thirdPartyCookies":[]}],"excludedCountries":[],"debug":false,"setInnerHTML":true,"mode":"GDPR","acceptBehaviour":"recommended","closeOnGlobalChange":true,"notifyDismissButton":true,"sameSiteCookie":true,"sameSiteValue":"Strict","iabCMP":false,"statement":[],"ccpaConfig":[],"accessibility":{"accessKey":"C","overlay":true,"outline":false},"text":{"title":"Our website uses cookies to improve your experience and personalise content.","intro":"

Cookies are small files placed on your computer or mobile device when you visit a website. They are widely used to improve your experience of a website, gather reporting information and show relevant advertising. You can allow all cookies or manage them for yourself. You can find out more on our cookies page any time.

\r\n","acceptRecommended":"Accept All","necessaryTitle":"Essential Cookies","necessaryDescription":"

These cookies are needed for essential functions such as signing in, storing products in your cart and making payments. They can’t be switched off and can only be disabled by changing your browser preferences.

\r\n","thirdPartyTitle":"Warning: Some cookies require your attention.","thirdPartyDescription":"

Consent for the following cookies could not be automatically revoked. Please follow the link(s) below to opt out manually.

\r\n","on":"On","off":"Off","notifyTitle":"Your choice regarding cookies on this site","notifyDescription":"

We use cookies to optimise site functionality and give you the best possible experience.

\r\n","accept":"Accept All Cookies","settings":"Cookie Preferences","closeLabel":"Save Changes","cornerButton":"Set cookie preferences.","landmark":"Cookie preferences.","iabCMP":{"panelTitle":null,"panelIntro1":null,"panelIntro2":null,"panelIntro3":null,"aboutIab":null,"iabName":null,"iabLink":null,"acceptAll":null,"rejectAll":null,"purposes":null,"specialPurposes":null,"features":null,"specialFeatures":null,"dataUse":null,"vendors":null,"purposeLegitimateInterest":null,"legalDescription":null,"vendorLegitimateInterest":null,"objectPurposeLegitimateInterest":null,"objectVendorLegitimateInterest":null,"relyConsent":null,"relyLegitimateInterest":null,"savePreferences":null},"showVendors":"","thirdPartyCookies":"","readMore":""},"branding":{"fontSizeTitle":"em","fontSize":"em","fontColor":"#ffffff","backgroundColor":"#2b2652","acceptText":"#2b2652","acceptBackground":"#fdbf14","toggleText":"#2b2652","toggleColor":"#fdbf14","toggleBackground":"#ffffff","alertText":"#ffffff","alertBackground":"#2b2652","buttonIconWidth":"144px","buttonIconHeight":"px","rejectText":null,"rejectBackground":"#2b2652","closeText":"","closeBackground":"","notifyFontColor":"","notifyBackgroundColor ":""},"locales":[]}

Latest news

Latest BMJ Practice Guidelines