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Experimental timeline for laryngeal chemoreflex and mammalian diving reflex experimental groups. “Experimental reflexes” is depicted through 180 min for clarity but may be shorter if death occurs or longer if recovery between reflexes requires longer than the 5-min minimum. The “control reflexes” period indicated by * denotes the period in which the control chemoreflex challenges occurred in two rats. In other chemoreflex experiments, this step was omitted
