Sequential targeted deficiency of SP-A and -D leads to progressive alveolar lipoproteinosis and emphysema. - Hawgood S; Ochs M; Jung A; Akiyama J; Allen L; Brown C; Edmondson J; Levitt S; Carlson E; Gillespie AM; Villar A; Epstein CJ; et al. (American journal of physiology. Lung cellular and molecular physiology, 2002)