Lab Anim. (NY) 38, 305–310 (2009).

Part of a sentence in the Discussion (page 308, second column, first sentence) was inadvertently omitted, changing the meaning of the sentence. The sentence should read, “However, in group-housed (n = 6–8 females per cage) female mice, this protocol has previously induced estrus or proestrus in 51% and 76% of female mice at 72 h and 96 h, respectively, after exposure to bedding soaked with male urine7.”