Gravar-mail: ZINC PEROXIDE IN THE TREATMENT OF MICROAËROPHILIC AND ANAËROBIC INFECTIONS: WITH SPECIAL REFERENCE TO A GROUP OF CHRONIC, ULCERATIVE, BURROWING, NON-GANGRENOUS LESIONS OF THE ABDOMINAL WALL APPARENTLY DUE TO A MICRO-AËROPHILIC HÆMOLYTIC STREPTOCOCCUS