LAUSR

The study by Pérez-Crespo et al [1] reports interesting results about the prevalence of multiple chemical sensitivity (MCS) among university researchers in Spain [1]. Surprisingly, they have found no difference in the prevalence of MCS between women and men [1]. This differs strikingly from that in all previous data. Consistent with published literature, women are particularly at risk from chemical sensitivity caused by chemicals. We would like to recommend few additions to their study. First and foremost, the article by Pérez-Crespo [1] does not mention or refer to possible chemical agents (a wide variety of chemical agents) used among participants employed as researchers in an academic setting [1] (refer Table 1 of our article). Because multiple chemical toxicants may exist among laboratory workers engaged in their research investigations, we expected that the article by Pérez-Crespo et al. [1] would contain a rough approximation of chemical substances used by laboratory staff in their departments at the university (i.e., organic solvents, acids, amines, aldehydes, alcohols, ethers, halogens, and metals/nonmetals/metalloids). As a related example, occupational exposure to organic solvents may lead to chemical odor intolerance, which is cacosmia, in 60% of