Impact of the change in WHO's severe pneumonia case definition on hospitalized pneumonia epidemiology: case studies from six countries

Fiona M Russell, Rita Reyburn, Jocelyn Chan, Evelyn Tuivaga, Ruth Lim, Jana Lai, Minh Tu Van Hoang, Molina Choummanivong, Vanphanom Sychareun, Khu Thi Khanh Dung, Margaret de Campo, Penny Enarson, Stephen Graham, Sophie La Vincente, Tuya Mungan, Claire von Mollendorf, Grant Mackenzie, Kim Mulholland