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Khoo, E.M. and Tong, S.F. and Low, W.Y. and Lee, B.C. and Lee, V.K.M. and Ng, C.J. and Zulkifli, Z. and Tan, H.M. (2010) Health care utilization in men with erectile dysfunction: Results of the subang aging male (SAM) study. Journal of Sexual Medicine, 7 (2). p. 106.