SPD|Pulmonary Surfactant Associated Protein D|SFTPD|SP-D|Collectin 7|PSP-D|SFTP4|COLEC7|collectin-7|Lung surfactant protein D|PSPD|pulmonary surfactant-associated protein D|pulmonary surfactant apoprotein|surfactant protein D|surfactant|pulmonary-associated protein D|surfactant-associated protein|pulmonary 4