Sleep centers in the U.S. reach 2515 in 2004.
Shariq
Katherine
K
D000554:Ambulatory Care Facilities / Q000706:statistics & numerical data*; D006761:Hospitals / Q000706:statistics & numerical data*; D006801:Humans; D012893:Sleep Wake Disorders / Q000175:diagnosis* / Q000628:therapy*; D014481:United States / Q000453:epidemiology