PDPN and congenital secretory chloride diarrhea 1: The percent interstitium podoplanin stained in the postsurfactant CLD group versus controls was again increased in infants with CLD but did not reach significance (1.43% ± 0.31% versus 0.93% ± 0.4% CI −1.11 to 0.11, P = 0.09 at the respiratory bronchiolar level and 0.46% ± 0.12% versus 0.31% ± 0.17% CI −0.4 to 0.1, P = 0.2 at the alveolar ductal level).