Developing a video expert panel as a reference standard to evaluate respiratory rate counting in paediatric pneumonia diagnosis: protocol for a cross-sectional study oleh Eric D McCollum, Salahuddin Ahmed, Abdullah H Baqui, Ahad Mahmud Khan, Steve Cunningham, Harry Campbell, Carina King, Ayaz Ahmed, Nabidul Haque Chowdhury, Ting Shi, Kamrun Nahar, Md Shafiqul Islam, Robynne Simpson, Md Mozibur Rahman