Surfactant Protein A (Pulmonary Surfactant-associated Protein A1, PSP-A, PSPA, SP-A, SP-A1, SP-A2, 35kD Pulmonary Surfactant-associated Protein, Alveolar Proteinosis Protein, Collectin-4, Collectin-5, SFTPA1, SFTPA2, COLEC4, PSAP, SFTP1, SFTPA, SFTPA1B, SFTPA2B)