Identical Triplets: Non-Identical Psychosis?

Twenty-five years ago in Genetics: identical triplets.

T HE March, 1967 issue of GENETICS contained three articles, independently written yet remarkably similar (SVED, REED and BODMER 1967; KING 1967; MILKMAN 1967). Although the three articles differed in style, length and approach, their essential message was the same. What point were they making? Why this curious concatenation in a single issue of GENETICS? Before discussing this, a bit of back...

Comparing Non-Identical Objects

The compare package provides functions for comparing two R objects for equality, while allowing for a range of “minor” differences. Objects may be reordered, rounded, or resized, they may have names or attributes removed, or they may even be coerced to a new class if necessary in order to achieve equality. The results of comparisons report not just whether the objects are the same, but also inc...

Are Biosimilars Identical to the Reference Products?

Are Biosimilars Identical to the Reference Products?

Identical atherosclerotic lesions in identical twins.

In 1997, a 55-year-old man underwent percutaneous coronary angioplasty (PTCA) of a lesion in the middle segment of the left anterior descending coronary artery (LAD) (Figure, A). He subsequently informed his cardiologist that his twin brother had also been treated successfully with PTCA at another hospital for stenosis of the LAD. The cineangiographic film of the twin brother was retrieved (Jac...