Herrera et al19 relied on a simple classificationbased on the Hamilton scale. Observing their Figure 1, however, one wondersif in fact there is a difference between "two areas" and "all areas." Also,the finding that 42.5% of all-age individuals are "completely bald," ie, "comparableto Hamilton scale class VIII," is an exceedingly high percentage, and, inany case, is in contrast with prevalences found by other authors. Irrespectiveof myocardial condition, Lesko et al18 foundonly 37 subjects with "severe vertex" baldness, corresponding to a mere 2.6%.None of their subjects belonged to Hamilton scale class VIII. Similarly, only9.2% of the patients of Mirić et al23had "fronto-parietal" baldness, and only 11.6% of the patients of Schnohret al20 had a "bald top and front." Only 6.9%of the subjects of Ford et al21 had "severe"baldness. This latter figure is also the general average obtained by summingall data from the extreme degrees of baldness in the studies of Lesko et al,18 Mirić et al,23Schnohr et al,20 and Ford et al.21Conversely, Mirić and colleagues, Schnohr and colleagues, Ford andcolleagues, and Lesko and colleagues found no baldness in 35.5%, 58.9%, 64.0%,and 38.1%, respectively, of men younger than 55 years. Therefore, the findingof a 6.4% prevalence of "normal" men in Herrera and colleagues' study is toolow to be reliable, at least when simple clinical observation is used as adiagnostic tool. Furthermore, this wide range of figures shows that normality of scalp hairiness is a vague concept.