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Ion of immortalized MARCO and SR-AI/II-deficient murine alveolar macrophage cell linesHongwei Zhou1, Amy Imrich1 and Lester Kobzik*1,Address: 1Department of Environmental Health, Harvard School of Public Health, Boston, MA, 02115, USA and 2Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA Email: Hongwei Zhou - hzhou@hsph.harvard.edu; Amy Imrich -