External validation of the bilirubin-atazanavir nomogram for assessment of atazanavir plasma exposure in HIV-1-infected patients. by Rekić, D, Röshammar, D, Bergstrand, M, Tarning, J, Calcagno, A, D'Avolio, A, Ormaasen, V, Vigan, M, Barrail-Tran, A, Ashton, M, Gisslén, M, Äbelö, A