S. Machala

Mechanism of greater oxygen desaturation during walking compared with cycling in patients with COPD.

J. Baird, D. Mahler, L. A. Waterman, 2011, Chest.

Subjective sleep quality and ethnicity are interactively related to standard and situation-specific measures of pain catastrophizing.

R. Fillingim, C. Campbell, L. Mcguire, 2011, Pain medicine.