which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. Acute myeloid leukemia with t(4;12)(q12;p13): report of 2 cases TO THE EDITOR: Acute myeloid leukemia (AML) with t(4;12) is rare, but its unique morphologic and clinical characteristics have been described in several reports [1-8]. Most cases show CD7 expres...

A sequential silver-Giemsa (SG) procedure is presented, initially to stain the p11 and q11 euchromatic bands and subsequently the q12 heterochromatic band of the human Y chromosomes. A three sub-band division of the q11 band can be identified. The same technique differentially stains the secondary constriction of chromosome 9 as well as most other satellite III DNA regions of the human karyotype.

This essay assesses the relationship between farm size and productivity. Both parametric and nonparametric methods are used to derive efficiency measures. Smaller farms are found to have higher net farm income per hectare, and to be more technically efficient, than larger farms. JEL Classifications: Q12, O12

A new non-parametric method to estimate a decision maker's coefficient of absolute risk aversion from observed economic behaviour is explained. The method uses the expected value-variance (E-V) framework and quadratic programming. An empirical illustration is given using Norwegian farm-level data. © 2002 Elsevier Science B.V. All rights reserved. JEL classification: Q12; D81

A Chinese girl with oculocutaneous albinism has the Prader-Willi syndrome and a normal karyotype. This association emphasises the importance of further molecular study of the 15(q12) region of the genome in the search for the locus of an albinism gene.

This essay assesses the relationship between farm size and productivity. Both parametric and nonparametric methods are used to derive efficiency measures. Smaller farms are found to have higher net farm income per hectare, and to be more technically efficient, than larger farms. JEL Classifications: Q12, O12

This study was purposed to characterize the first case of acute promyelocitic leukemia (AML-M(3a)) with t(15;17), trisomy 8 and tetrasomy 8, and explore its characteristics of morphology, cytogenetics, molecular biology, immunology and clinical features. Morphological changes of peripheral blood and bone marrow smears were observed under microscope. Chromosome specimen was prepared by 24 h shor...