Altered surfactant homeostasis and alveolar type II cell morphology in mice lacking surfactant protein D. - Botas C; Poulain F; Akiyama J; Brown C; Allen L; Goerke J; Clements J; Carlson E; Gillespie AM; Epstein C; Hawgood S (Proceedings of the National Academy of Sciences of the United States of America, 1998)