Cerimele JM, Halperin AC, Spigner C, Ratzliff A, Katon WJ. Collaborative care psychiatrists’ views on treating bipolar disorder in primary care: a qualitative study. Gen Hosp Psychiatry. 2014 Nov-Dec;36(6):575-80. doi: 10.1016/j.genhosppsych.2014.07.013.