Capogrosso P, Colicchia M, Ventimiglia E, Castagna G, Clementi MC, Suardi N, et al. One patient out of four with newly diagnosed erectile dysfunction is a young man—Worrisome picture from the everyday clinical practice. J Sex Med. 2013;10:1833–41.
Costa IC, Carvalho HN, Pacheco-Figueiredo L, Tomada I, Tomada N. Hormonal modulation in aging patients with erectile dysfunction and metabolic syndrome. Int J Endocrinol. 2013;2013:107869.
Braun M, Wassmer G, Klotz T, Reifenrath B, Mathers M, Engelmann U. Epidemiology of erectile dysfunction: results of the ‘Cologne Male Survey’. Int J Impot Res. 2000;12:305–11.
Tsujimura A, Kiuchi H, Soda T, Takezawa K, Okuda H, Fukuhara S, et al. Sexual life of Japanese patients with erectile dysfunction taking phosphodiesterase type 5 inhibitors: an internet survey using the psychological and interpersonal relationship scales-short form questionnaire. Int J Urol. 2014;21:821–5.
Wylie KR, Eardley I. Penile size and the ‘small penis syndrome’. BJU Int. 2007;99:1449–55.
Rosen RC, Riley A, Wagner G, Osterloh IH, Kirkpatrick J, Mishra A. The international index of erectile function (IIEF): a multidimensional scale for assessment of erectile dysfunction. Urology. 1997;49:822–30.
Rosen RC, Cappelleri JC, Smith MD, Lipsky J, Peña BM. Development and evaluation of an abridged, 5-item version of the International Index of Erectile Function (IIEF-5) as a diagnostic tool for erectile dysfunction. Int J Impot Res. 1999;11:319–26.
Reis AL, Reis LO, Saade RD, Santos CA Jr, Lima ML. Fregonesi. Validation of Portuguese version of quality of erection questionnaire (QEQ) and comparison to International Index of Erectile Function (IIEF) and RAND 36-Item Health Survey. Int Braz J Urol. 2015;4:155–67.
Veale D, Miles S, Bramley S, Muir G, Hodsoll J. Am I normal? A systematic review and construction of nomograms for flaccid and erect penis length and circumference in up to 15,521 men. BJU. 2015;115:978–86.
Reis LO, Simão AF, Baracat J, Denardi F, Gugliotta A. Digital rectal examination standardization for inexperienced hands: teaching medical students. Adv Urol. 2013;2013:797096.
Expert Panel on Detection, Evaluation, and Treatment of High Blood Cholesterol in Adults. Executive summary of the third report of the National Cholesterol Education Program (NCEP) expert panel on detection, evaluation, and treatment of high blood cholesterol in adults (adult treatment panel III). JAMA 2001; 285: 2486–97.
Veale D, Eshkevari E, Read J, Miles S, Troglia A, Phillips R, et al. Beliefs about penis size: validation of a scale for men ashamed about their penis size. J Sex Med. 2014;11:84–92.
Veale D, Miles S, Read J, Troglia A, Wylie K, Muir G. Sexual functioning and behavior of men with body dysmorphic disorder concerning penis size compared with men anxious about penis size and with controls: a cohort study. Sex Med. 2015;3:147–55.
Wessells H, Lue TF, McAninch JW. Penile length in the flaccid and erect states; guidelines for penile augmentation. J Urol. 1996;156:995–7.
Rajkumar RP, Kumaran AK. Depression and anxiety in men with sexual dysfunction: a retrospective study. Compr Psychiatry. 2015;60:114–8.
McCabe MP, Althof SE. A systematic review of the psychosocial outcomes associated with erectile dysfunction: does the impact of erectile dysfunction extend beyond a man’s inability to have sex? J Sex Med. 2014;11:347–63.
Shaeer O, Shaeer K. The Global Online Sexuality Survey (GOSS): ejaculatory function, penile anatomy, and contraceptive Usage among Arabic-speaking internet users in the Middle East. J Sex Med. 2012;9:425–33.
Promodu K, Shanmughadas KV, Bhat S, Nair KR. Penile length and circumference: an Indian study. Int J Import Res. 2007;19:558–63.
Aslan Y, Atan A, Omur Aydın A, et al. Penile length and somatometric parameters: a study in healthy young Turkish men. Asian J Androl. 2011;13:339–41.
Khan S, Somani B, Lam W, Donat R. Establishing a reference range for penile length in Caucasian British men: a prospective study of 609 men. BJU Int. 2012;109:740–4.
Shalaby ME, Almohsen AE, El Shahid AR, Abd Al-Sameaa MT, Mostafa T. Penile length—somatometric parameters relationship in healthy Egyptian men. Andrologia. 2015;47:402–6.
Habous M, Tealab A, Williamson B, Binsaleh S, El Dawy S, Mahmoud S, et al. Erect penile dimensions inacohort of 778 Middle Eastern men: establishment of a nomogram. J Sex Med. 2015;12:1402–6.
Kamel I, Gadalla A, Ghanem H, Oraby M. Comparing penile measurements in normal and erectile dysfunction subjects. J Sex Med. 2009;6:2305–10.
Ma YM, Wu KJ, Dang Q, Shi Q, Gao Y, Guo P, et al. Testosterone regulates keratin 33B expression in rat penis growth through androgen receptor signaling. Asian J Androl. 2014;16:817–23.
Garimella PS, Paudel ML, Ensrud KE, Marshall LM, Taylor BC, Fink HA, et al. Association between body size and composition and erectile dysfunction in older men: osteoporotic fractures in men study. J Am Geriatr Soc. 2013;61:46–54.