Single Article Purchase:
Association Between Serum 25-Hydroxyvitamin D Level and Upper Respiratory Tract Infection in the Third National Health and Nutrition Examination Survey
Ginde AA, Mansbach JM, Camargo CA, Jr.
Arch Intern Med. 2009;169(4):384-390.
Published online February 23, 2009
Choose criteria for pricing info
Want online access for an institution? Learn More/Request Quote >
Obtain AMA PRA Category 1 Credit™ by reading an article and completing an online quiz. Quizzes are available to AMA Members, subscribers, and those who have purchased tokens.