Use of preventive services in the 2 years before the index date was as follows: 40% had an influenza vaccination, 14% had a pneumonia vaccination, 32% had either returned stool cards or had a flexible sigmoidoscopy, 17% of the men had a PSA test, 68% of the women had a mammogram, and 47% had a preventive office visit. Here, KLK3 is linked to influenza.