Study protocol
Data for this analysis were acquired at baseline assessment held at the start of a pulmonary rehabilitation course, and following completion of the pulmonary rehabilitation at 6–8 weeks. At each study visit, identical measures were collected. Following the first visit, participants were randomised in a double-blind procedure to receive either 250 mg oral D-cycloserine or a matched placebo. Participants received a single dose on four occasions 30 min prior to the onset of the first four pulmonary rehabilitation sessions.