Global, regional, and national levels of maternal mortality, 1990–2015: a systematic analysis for the Global Burden of Disease Study 2015 מאת Kassebaum, NJ, Barber, RM, Dandona, L, Hay, SI, Larson, HJ, Lim, SS, Lopez, AD, Mokdad, AH, Naghavi, M, Pinho, C, Steiner, C, Vos, T, Wang, H, Achoki, T, Anderson, GM, Arora, M, Biryukov, S, Blore, JD, Carter, A, Casey, DC, Coates, MM, Coggeshall, M, Dicker, DJ, Dossou, E, Fleming, T, Fraser, MS, Friedman, J, Fullman, N, Graetz, N, Hancock, J, Huynh, C, Iannarone, M, Kemmer, L, Kulikoff, XR, Kutz, MJ, Liu, PY, Marquez, N, Misganaw, A, Mooney, MD, Moradi-Lakeh, M, Ng, M, Nguyen, G, Pain, A, Shackelford, KA, Silpakit, N, Sligar, A, Smith, JM, Sorensen, RJD, Vollset, SE, Wagner, JA, Wolock, T, Zhao, Y, Zhou, M, Murray, CJL, Ebel, BE, Futran, ND, Harun, KM, Bhutta, ZA, Nisar, MI, Akseer, N, Bhutta, ZA, Jeemon, P, Dandona, L, Dandona, R, Goenka, S, Kumar, GA, Gething, PW, Bisanzio, D, Deribew, A, Cooper, C, Hay, SI, Ali, R, Bennett, DA, Jha, V, Rahimi, K, Kinfu, Y, Larson, HJ, Murthy, GVS, Li, Y, Liu, S, Wang, L, Zhou, M, Liang, X, Yu, S, Lopez, AD, Azzopardi, P, Gibney, KB, Meretoja, A, Szoeke, CEI, Azzopardi, P, Alam, K, Colquhoun, SM, Weintraub, RG, Alam, K, Colquhoun, SM, Wijeratne, T, Lozano, R, Campos-Nonato, IR, Campuzano, JC, Gomez-Dantes, H