Medicine: Big Sky, Big Burn

When the American Medical Association met in Dallas last week for its annual winter clinical sessions, the sun shone brilliantly if coolly over what Texans call the "Land of the Big Sky." But big sky and bright sun are far from being an unmixed blessing, warned Houston's Dr. John M. Knox, a dermatology professor at Baylor University College of Medicine. Along with other skin specialists in the Southwest, he is seeing more and more harmful effects from exposure to the sun, now that leisure time is increasing and proportionately more of it is spent in "healthy" outdoor activity (and, he...

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