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Kadhim-Saleh A, Green M, Williamson T, Hunter D, Birtwhistle R.Kadhim-Saleh A, et al. Among authors: birtwhistle r.J Am Board Fam Med. 2013 Mar-Apr;26(2):159-67. doi: 10.3122/jabfm.2013.02.120183.J Am Board Fam Med. 2013.PMID: 23471929Free article.