R Invernizzi, S Comincini, E Travaglino, A Facoetti, I Ramajoli and R Nano (2003) “Defective expression of the dihydrofolate reductase gene in patients with the 5q- syndrome”, Haematologica. Pavia, Italy, 88(4), pp. 471-474. doi: 10.3324/%x.