<qa>  What is the effect of chemo on exercise capacity and other CPET variables?2. Effect of chemo on exercise capacity and other CPET variables. Patients who do not complete NAC and 2 CPET tests will be eligible to enter the study and their data collected. The sample size calculation and primary analysis will be of patients who complete CPET before and after NAC. Secondary analyses will include patients who were unable to complete CPET before and after NAC, and will compare patients who underwent surgery and those in whom surgery was subsequently canceled. 