@article{Imaizumi2001,
author = {Imaizumi, Y.},
title= {Infant mortality rates in single, twin and triplet births, and influencing factors in Japan, 1995-98},
year = {2001},
doi = {10.1046/j.1365-3016.2001.00378.x},
journal = {Paediatric and Perinatal Epidemiology},
volume = {15},
number = {4},
pages = {346--351},
}