BAL Cell Percentages. Percentage of lymphocytes (A), macrophages (B), neutrophils (C), eosinophils (D) and other cell types (E) in BAL. Differential cell counts were performed by the clinical cytology laboratory on haematoxylin & eosin stained cytospins. A total of 300 cells were counted on each slide. Data are presented as % total cell count for each individual data point. Error bars indicate mean +/− S.E.M. or Median with I.Q.R. * = p < 0.05, ** = p < 0.01, *** = p < 0.001.