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The Physician and Sportsmedicine|December 29, 2017
Pectoralis Major RuptureJanus D Butcher, Andrew Siekanowicz, Frank PettroneCurrent Sports Medicine Reports|October 28, 2006
Exercise-induced asthma in the competitive cold weather athleteJanus D ButcherClinical Journal of Sport Medicine : Official Journal of the Canadian Academy of Sport Medicine|October 24, 2002
A sport-specific protocol for diagnosing exercise-induced asthma in cross-country skiersJena Ogston, Janus D ButcherPageof 1