1409-41421409-4142S1409-41422021000200005El SalvadorSan SalvadorCosta Rica001220210012202123259201739010100101001151-210Organización Mundial de la Salud.2020201627S3S398-10220152633125-3920193466910-23Ministerio de Salud.201720122366657-65202114388e254-743200436494389438937-522020151979-902019141181-93201232131-9World Medical Association201331020202191-4U.S. Department of Health and Human Services201419925612121199-205200837196169616923-3120202477791-5202018910101057-64.202012412121329-372016214279-83