| P H A Bours Increasing resistance in community-acquired urinary tract infections in Latin America, five years after the implementation of national therapeutic guidelinesP H A Bours Department of Internal Medicine and Infectious Diseases, University Medical Center, PO Box 85500, Room F 02 126, 3508 GA Utrecht, The Netherlands Int J Infect Dis 14:e770-4. 2010 Seasonal variation of serum 25-hydroxyvitamin D levels in adult patients with inflammatory bowel diseaseP H A Bours Department of Gastroenterology and Hepatology, Meander Medical Centre, Amersfoort, The Netherlands Osteoporos Int 22:2857-67. 2011
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