I. Marete,C. Tenge,O. Pasha,S. Goudar,E. Chomba,A. Patel,F. Althabe,A. Garces,E. M. McClure,S. Saleem,F. Esamai,B. S. Kodkany,J. M. Belizan,R. J. Derman,P. L. Hibberd,N. Krebs,P. Buekens,R. L. Goldenberg,W. A. Carlo,D. Wallace,J. Moore,M. Koso-Thomas,L. L. Wright and E. A. Liechty. Perinatal outcomes of multiple-gestation pregnancies in Kenya, Zambia, Pakistan, India, Guatemala, and Argentina: a global network study. Am J Perinatol. 2014;31(2):10.1055/s-0033-1338173.