“…Considerable effort has been directed to studying their immunological and cytochemical markers, which in published reports are also diverse (Peter & MacKenzie, 1974;Aisenberg & Long, 1975;Habeshaw & Stuart, 1975;Leech et al, 1975;Morris & Davey, 1975;Bloomfield et al, 1976;Brouet et al, 1976;Davey et al, 1976;Bloomfield et al, 1977;Lawrence et al, 1978;Lukes et al, 1978a, b;Mann et al, 1979;Pinkus et al, 1979;Suchi et al, 1979;Woda & Knowles, 1979 (Fialkow et al, 1973;Mann et al, 1976). These findings are not surprising since IgM is the immunoglobulin most frequently identified on B lymphocytes from normal peripheral blood (Aisenberg, 1973).…”