title: Response to letter.
authors: Holly A
authors: HA
authors: Pattenden
authors: Neeraj M
authors: NM
authors: Shah
authors: David
authors: D
authors: Hillebrandt
authors: Mike
authors: M
authors: Rodger
authors: Jeremy S
authors: JS
authors: Windsor
mesh_terms: D000532:Altitude Sickness / Q000188:drug therapy*; D004864:Equipment and Supplies / Q000592:standards*; D006801:Humans; D009051:Mountaineering