Babu, AS and Maiya, AG and Padmakumar, R (2013) Should cardiopulmonary exercise testing become a part of regular evaluation for patients with a family history of pulmonary hypertension? Regarding "Cardiopulmonary exercise testing reveals onset of disease and response to treatment in a case of heritable pulmonary arterial hypertension". Pulmonary Circulation , 3 (1). pp. 121-122.