This recent study titled "Preparation of Gluten-Free Foods Alongside Gluten-Containing Food May Not Always Be as Risky for Celiac Patients as Diet Guides Suggest" will appear in Gastroenterology. The study looked into the importance of avoiding cross contact. Here is Gluten-Free Watchdog's comment on the study. Dr. Alessio Fasano from the Center for Celiac Research and Treatment discussing this study in this video.
This study is titled "Gluten consumption during infancy tied to type 1 diabetes risk."
This article discusses nutrients that are commonly missing in a GF diet.