“…The result did not change when the same heading was used as a text entry to search not only the MeSH headings but also the abstracts and titles of the references; again, only 12.3% of the chronobiologic articles were identified. The result was even worse with the use of the term chronobiology disorders for the search descriptor, as it was found to be associated only with one (2.4%) reference (Arendt, 2006) out of the 41 articles dealing with disruptions of cycles of bodily functions or activities (Arendt, 2006;Arraj & Lemmer, 2006;Berge et al, 2005;Borodkin et al, 2005;Cajochen et al, 2006;Chacon et al, 2005;Costa et al, 2006;de Pinho et al, 2006;Doljansky et al, 2005;Dorrian et al, 2006;Eriksen & Akerstedt, 2006;Haynes et al, 2005;Herwig et al, 2006;Jay et al, 2006;Koch & Fischer-Barnicol, 2005;Kocher et al, 2006;Lammers-van der Holst et al, 2006;Lamond et al, 2006;Lavie & Lavie, 2007;Lemmer et al, 2005;Mansour et al, 2005;Monk et al, 2006;Murray et al, 2005;Oginska & Pokorski, 2006;Paul & Lemmer, 2007;Petrilli et al, 2006;Raediker et al, 2006;Rosenwasser et al, 2005;Rupp et al, 2007;Schomann et al, 2006;Steele et al, 2005;Takahashi et al, 2006;Tucker et al, 2006;Van der Heijden et al, 2005;…”