https://www.redadvenir.org/redadvenir/david-gates/video.php?start=0&testo=Pr.+Richard+Gates%3A++Historia+de+la+obra+medica+de+la+iglesia+adventista+%2F+History+of+the+SDA%27s+Medical+Work&titolo=Pr.+Richard+Gates%3A++Historia+de+la+obra+medica+de+la+iglesia+adventista+%2F+History+of+the+SDA%27s+Medical+Work+%5Bus%5D+%5Bes%5D&video=Enrique+Rosenthal&yt=gUm3ZFysbFQ