Sex, power and echos.
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Crilly
D000367:Age Factors; D003327:Coronary Disease / Q000628:therapy*; D004452:Echocardiography / Q000706:statistics & numerical data; D005194:Family Practice / Q000458:organization & administration*; D005260:Female; D006801:Humans; D008297:Male; D012017:Referral and Consultation; D012737:Sex Factors