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Immunoblot pattern of human sera with Pneumocystis carinii antigen form 4 localities, Chunchon (A), Chungju (B), Kwangju (C), and Seoul (D), M, size marker; lane 1-5, Chunchon human sera; lane 6-10, Chungju human sera; lane 11-15, Kwangju human sera; lane 16-20, Seoul human sera.
