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DEAR EDITOR Boutonnière deformity (BD) is a debilitating deformity where the proximal interphalangeal (PIP) joint of the finger is flexed, and the distal interphalangeal (DIP) joint is hyperextended.1-3 BD is commonly seen after injury and also as a sequela of progressive inflammatory conditions such as rheumatoid arthritis.1-3 Various techniques have been described to address the imbalance bet...

Triiodothyron me (T3)-upta ke values in selected human serum pools were compared by use of Abbott’s “Trisorb,” Mallinckrodt Nuclear’s “Res0-Mat,” Curtis Nuclear’s “Tri-lonex,” and a standard procedure. In addition, interlaboratory variation was measured among laboratories using the Abbott and Mallinckrodt procedures. Study of methodological variables indicated that incubation time and temperatu...

The paper discusses the Andrews-Curtis graph ∆k(G,N) of a normal subgroup N in a group G. The vertices of the graph are k-tuples of elements in N which generate N as a normal subgroup; two vertices are connected if one them can be obtained from another by certain elementary transformations. This object appears naturally in the theory of black box finite groups and in the Andrews-Curtis conjectu...

A generalized Chebyshev interpolation procedure increasing a fixed number of sample points at a time is developed and analyzed. It is incorporated into an efficient automatic quadrature scheme of Clenshaw-Curtis type. Numerical examples indicate that the present method is efficient not only for well-behaved functions but for those with discontinuous low order derivatives by virtue of adequate e...