SFTPB and asthma: Expression of SFTPA and SFTPB was higher in asthma+beta than in control (P = 0.004 and P < 0.001 respectively) or asthma lambs (P = 0.048 and P < 0.001, respectively) and did not differ between asthma and control lambs (P = 1.000 and P = 0.895, respectively).