Fig. 2.

A: hemoglobin levels in Ethiopians and Tibetans are similar to those of US sea-level residents and below those seen Andean males or females at the altitudes shown[Reproduced from Beall et al. (10) with permission from the National Academy of Sciences. Copyright © 2002 National Academy of Sciences.]. Values among the high-altitude groups are, however, more similar if comparisons are made with acclimatized newcomers (see Table 2). B: Tibetans and Andeans have approximately half the altitude-associated reduction in infant birth weight compared with Europeans or Han Chinese [see text for details and (110) for original references]. C: prevalence of chronic mountain sickness (CMS) is markedly less in Tibetans than similarly aged men from various ancestry groups residing at the altitudes shown. Original references may be found in 110. [Adapted from Niermeyer et al. (110) with permission from SAGE Publications.]