Riyadh Mother and Baby Multicenter Cohort Study: The Cohort Profile - Wahabi, H; Fayed, A; Esmaeil, S; Alzeidan, R; Elawad, M; Tabassum, R; Hansoti, S; Magzoup, ME; Al-Kadri, H; Elsherif, E; Al-Mandil, H; Al-Shaikh, G; Zakaria, N (PLoS One, 2016)