“…(i) negative MLC reactions between HL-A non-identical siblings (Bach & Amos 1967, Amos & Bach 1968, Dupont et al 1971, Gatti et al 1971, Lebrun et al 1971, Eijsvoogel et al 1972a ; (ii) positive MLC reactions between HL-A identical siblings (Amos & Bach 1968, Bach et al 1969, Plate et al 1970) ; (iii) negative MLC reactions between HL-A non-identical siblings and positive MLC reactions between HL-A identical siblings, combined in one family , Eijsvoogel et al 1972a,b, Mempel et al 1972, Sasportes et al 1972, Dupont et al 1974 ; positive MLC reactions between HL-A identical unrelated individuals (Kissmeyer-Nielsen et al 1970, van Rood & Eijsvoogel 1970, Slarensen & Staub Nielsen 1970, Eijsvoogel et al 1971, Sengar et al 1971, Mempel et al 1973a ; negative MLC reactions between HL-A non-identical unrelated individuals (Pentycross et al 1972, BlussC van Oud Alblas, personal communication, Mempel et al 1973a, van den 'Tweel et al 1973).…”