Appropriateness of clinical severity classification of new WHO childhood pneumonia guidance: a multi-hospital, retrospective, cohort study oleh Ambrose Agweyu, PhD, Prof Richard J Lilford, PhD, Prof Mike English, MD, Grace Irimu, Philip Ayieko, Sam Akech, David Githanga, Fred Were, Barnabas Kigen, Samuel Ng'arng'ar, Nick Aduro, Rachel Inginia, Beatrice Mutai, Grace Ochieng, Lydia Thuranira, Francis Kanyingi, Magdalene Kuria, Sam Otido, Kigondu Rutha, Peris Njiiri, Martin Chabi, Charles Nzioki, Joan Ondere, Caren Emadau, Cecelia Mutiso, Loice Mutai, Christine Manyasi, David Kimutai, Celia Muturi, Agnes Mithamo, Anne Kamunya, Alice Kariuki, Grace Wachira, Melab Musabi, Sande Charo, Naomi Muinga, Mercy Chepkirui, Timothy Tuti, Boniface Makone, Wycliffe Nyachiro, George Mbevi, Thomas Julius, Susan Gachau, Morris Ogero, Michael Bitok, James Wafula