COLD AGGLUTININS. II. COLD ISOHEMAGGLUTININS IN PRIMARY ATYPICAL PNEUMONIA OF UNKNOWN ETIOLOGY WITH A NOTE ON THE OCCURRENCE OF HEMOLYTIC ANEMIA IN THESE CASES

^{Thorndike Memorial Laboratory, Second and Fourth Medical Services (Harvard), Boston City Hospital, Boston}

^{Department of Medicine, Harvard Medical School, Boston}

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^{Thorndike Memorial Laboratory, Second and Fourth Medical Services (Harvard), Boston City Hospital, Boston}

^{Department of Medicine, Harvard Medical School, Boston}

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^{Thorndike Memorial Laboratory, Second and Fourth Medical Services (Harvard), Boston City Hospital, Boston}

^{Department of Medicine, Harvard Medical School, Boston}

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^{Thorndike Memorial Laboratory, Second and Fourth Medical Services (Harvard), Boston City Hospital, Boston}

^{Department of Medicine, Harvard Medical School, Boston}

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^{Thorndike Memorial Laboratory, Second and Fourth Medical Services (Harvard), Boston City Hospital, Boston}

^{Department of Medicine, Harvard Medical School, Boston}

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