BALTIMORE—One in six infants and toddlers admitted to a Colorado hospital with coughing, wheezing and other symptoms of bronchiolitis tested positive for marijuana exposure, according to a recent study presented at the 2016 annual meeting of the Pediatric Academic Societies (abstract 4460.8).

Researchers recruited parents of previously healthy children between 1 month and 2 years of age who were admitted to Children’s Hospital Colorado (CHC) between January