الإتاحة: https://doi.org/10.1001/jama.2016.0291Testhttp://hdl.handle.net/11571/1165481Testhttp://jama.jamanetwork.com/article.aspx?articleid=2492877Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=pmid________::654c4c9e5e2f09c406d853e93dc359c7Testhttps://pubmed.ncbi.nlm.nih.gov/23506046Test