Thyroid Studies Need to Be Considered for Children With Global Developmental Delay Even With Negative Newborn Screen

We read, with interest, the article by Shellhaas et al., titled “Gene-targeted Therapies in Pediatric Neurology: Challenges and Opportunities in Diagnosis and Delivery.”1 We agree that development of guidelines would likely be helpful for practitioners in the wake of availability of gene therapies; however, we would like to extend a comment that while with the advent of precision and personalized medicine for rare diseases, we risk losing sight...