マウス小腸陰窩底部に存在するリゾチーム陽性細胞の同定と分類および分泌顆粒の構造と金コロイド標識密度の相関性についてThe Identification and Classification of Lysozyme-expressing Cells in the Mouse Small Intestinal Crypt and Their Correlation with the Morphology of Secretory Granules and Labeling Density of Immunogold