Acute severe paediatric asthma: study protocol for the development of a core outcome set, a Pediatric Emergency Research Networks (PERN) study oleh Simon Craig, Franz E. Babl, Stuart R. Dalziel, Charmaine Gray, Colin Powell, Khalid Al Ansari, Mark D. Lyttle, Damian Roland, Javier Benito, Roberto Velasco, Julia Hoeffe, Diana Moldovan, Graham Thompson, Suzanne Schuh, Joseph J. Zorc, Maria Kwok, Prashant Mahajan, Michael D. Johnson, Robert Sapien, Kajal Khanna, Pedro Rino, Javier Prego, Adriana Yock, Ricardo M. Fernandes, Indumathy Santhanam, Baljit Cheema, Gene Ong, Shu-Ling Chong, Andis Graudins, On behalf of the Pediatric Emergency Research Networks (PERN)