Letters to the Editor

Braddick MR . Bleeding in Crohn's disease through vitamin K malabsorption. Br Med J 1984; 288: 1498.

Gupta S Pahwa R O'Reilly R Good RA Siegal FP. Ontogeny of lymphocyte subpopulations in human fetal liver. Proc Natl Acad Sci USA 1976; 73: 919–22.

Lucivero G Lawton AR Cooper MD. Rosette formation with mouse erythrocytes defines a population of human B lymphocytes unresponsive to pokeweed nitrogen. Clin Exp Immunol 1981; 45: 185–90.

Davey FR Kurec AS. Mouse rosette positive B cells stimulate poorly in the autologous and allogenic mixed lymphocyte reaction. Clin Exp Immunol 1982; 49: 193–9.

WHO Scientific Group on Immunodeficiency. Primary immunodeficiency diseases. Clin Immunol Immunopathol 1983; 28: 450–75.

Hampson WGS Harris FC Lucas HK Failure of low-dose heparin to prevent deep vein thrombosis after hip-replacement arthroplasty. Lancet 1974; ii: 795–7.

Bernand KG O'Donnell T Thomas ML Browse NL. Relation between postphlebitic changes in the deep veins and results of surgical treatment of venous ulcers. Lancet 1976; i: 936–8.