Serum 25-hydroxyvitamin D levels are lower in urban African American subjects with chronic rhinosinusitis.
Pinto JM, Schneider J, Perez R, DeTineo M, Baroody FM, Naclerio RM. Serum 25-hydroxyvitamin D levels are lower in urban African American subjects with chronic rhinosinusitis. J Allergy Clin Immunol. 2008 Aug; 122(2):415-7.