• Tetsuya Endo’s team, which found high levels of mercury in whalemeat (8 June, p 17), is based at the Health Sciences University of Hokkaido in Ishikari-Tobetsu, not as reported at the University of Hokkaido, which is sited in Sapporo.
• The eighth paragraph of the article on semen and depression (29 June, p 5) stated “In this this study, the never-use-condoms group were more depressed than the usually-use-condoms group.” It should have read, of course, “the always-use-condoms groups were more depressed”.
