An outcome-based definition of low birthweight for births in low- and middle-income countries: a secondary analysis of the WHO global survey on maternal and perinatal health - Laopaiboon, Malinee; Lumbiganon, Pisake; Rattanakanokchai, Siwanon; Chaiwong, Warut; Souza, João Paulo Dias de; Vogel, Joshua P.; Mori, Rintaro; Gülmezoglu, Ahmet Metin (BMC Pediatrics, 2019)