Citation: Kj. Mcinnis et al., Comparison of cardiopulmonary responses in obese women using ramp versus step treadmill protocols, AM J CARD, 83(2), 1999, pp. 289
Citation: Ds. Bader et al., Comparison of ramp versus step protocols for exercise testing in patients >= 60 years of age, AM J CARD, 83(1), 1999, pp. 11-14