1. Sildenafil and Exercise Capacity in the Elderly at Moderate Altitude
George W. Rodway, PhD, APRN, Anne J. Lovelace, BS, Michael J. Lanspa, MD, Scott E. McIntosh, MD, MPH, James Bell, Ben Briggs, BS, Lindell K. Weaver, MD, Frank Yanowitz, MD, Colin K. Grissom, MD 
Wilderness & Environmental Medicine 
Volume 27, Issue 2, Pages (June 2016)
DOI: /j.wem
Copyright © 2016 Wilderness Medical Society Terms and Conditions

2. Figure 1
Experimental design. Assignment to placebo and sildenafil groups was by a randomized, double-blind, and crossover design.
Wilderness & Environmental Medicine  , DOI: ( /j.wem )
Copyright © 2016 Wilderness Medical Society Terms and Conditions

3. Figure 2 Peak oxygen consumption (V̇o2) by subject (n = 12).
Wilderness & Environmental Medicine  , DOI: ( /j.wem )
Copyright © 2016 Wilderness Medical Society Terms and Conditions