Content validity of a newly developed observer-reported measure for pediatric asthma in children aged 2-5 years May 28, 2022 Form Chicago Authors: Yi Zhang, Jennifer L Clegg, Shannon Keith ,Shehan McFadden, Tara Symonds, Rajesh Kumar, Asif H Khan, Siddhesh Kamat, Jingdong Chao DOI: 10.1186/s41687-022-00461-y