TY - GEN AU - Factor,Stephanie H TI - More study needed on morning erections and erectile dysfunction SN - 1555-7162 PY - 2009///0219 KW - Erectile Dysfunction KW - physiopathology KW - Humans KW - Male KW - Penile Erection N1 - Publication Type: Comment; Letter UR - https://doi.org/10.1016/j.amjmed.2008.09.020 ER -