{"version":"1.0","provider_name":"The BMJ","provider_url":"https:\/\/bmj-chicken.bmj.com\/covid-19","author_name":"ijones","author_url":"https:\/\/bmj-chicken.bmj.com\/covid-19\/author\/ijones","title":"Statistics at Square One - The BMJ","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"tQ6hmsW1EH\"><a href=\"https:\/\/bmj-chicken.bmj.com\/covid-19\/about-bmj\/resources-readers\/publications\/statistics-square-one\">Statistics at Square One<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/bmj-chicken.bmj.com\/covid-19\/about-bmj\/resources-readers\/publications\/statistics-square-one\/embed#?secret=tQ6hmsW1EH\" width=\"600\" height=\"338\" title=\"&#8220;Statistics at Square One&#8221; &#8212; The BMJ\" data-secret=\"tQ6hmsW1EH\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/\/# sourceURL=https:\/\/bmj-chicken.bmj.com\/covid-19\/wp-includes\/js\/wp-embed.min.js\n<\/script>\n","description":"Ninth Edition T D V Swinscow Revised by M J Campbell, University of Southampton Copyright BMJ Publishing Group 1997 NB: Readers occasionally point out errors in this book and remind us that there have been several revised editions since this one, which we would refer our readers to. The text that is replicated here reflects [&hellip;]"}