Overview Study to Evaluate Effects of Investigational Drug on Oxygenation in Healthy Volunteers Under Hypoxic Conditions Status: Terminated Trial end date: 2018-02-21 Target enrollment: Participant gender: Summary To evaluate the effect of GBT440 on oxygen saturation at rest and exercise, under hypoxic conditions, at Day 15 compared to Baseline. Phase: Phase 1 Details Lead Sponsor: Global Blood TherapeuticsCollaborator: Mayo ClinicTreatments: Pyrazole