Lifeguards and Benny.
Linton
Otha
O
D004521:Educational Measurement / Q000379:methods*; D004632:Emergency Medical Services; D007396:Internship and Residency / Q000379:methods*; D015701:Near Drowning / Q000517:prevention & control*; D012151:Resuscitation; D013550:Swimming; D014481:United States