Figure 1: (a-c) Representative examples of immunopositive reactions in the lung. All three samples were from Group 1, who experienced sudden death while bathing. (a) SP-A expression. Many massive aggregates of stained granules were observed in the intra-alveolar space (pattern 2: score 3, ×200). Positive reactions for (b) HSP70 (score 3, ×400) and (c) c-Fos (score 2, ×400) were observed in alveolar epithelial cells.