title: Reply to letter: How to accurately perform chest compressions (CC) according to CPR guidelines on mattresses of varying softness.
authors.forename: Akira
authors.initials: A
authors.lastname: Nishisaki
authors.forename: Robert M
authors.initials: RM
authors.lastname: Sutton
authors.forename: Vinay M
authors.initials: VM
authors.lastname: Nadkarni
mesh_terms: D001513:Beds; D016887:Cardiopulmonary Resuscitation / Q000295:instrumentation*; D006323:Heart Arrest / Q000628:therapy*; D006801:Humans