That's why Dr.Michael Irwig gives lectures on Vitamin D to the staff at the George Washington University Hospital.

VOA: standard.2010.05.28

He says the finding might also help explain why people with A.D.H.D.

VOA: special.2009.09.29

If you hate the cold and the rain so much, why'd you move to the wettest placein the continental US?

VOA: standard.other