The article studies the diversification behavior of four large diversified Colombian business groups five years before and after the 1991 trade opening, as measured by the entropy index. It is shown that the trade opening did not lead the business groups to reduce their diversification but...

In people with diabetes, a foot infection often leads to amputation. Plain film x-ray is the traditional method in assessing foot bone infections but magnetic resonance is more sensitive and specific. A comparison is performed here between radiography and radiography plus magnetic resonance in...

A decision tree is used to assess the cost effectiveness of adding the type B natriuretic peptid to the revised Lee index of cardiovascular risk. The Lee=3 strategy is cost effective for a WTP lower than Col $11.292.903 at a cost per patient of Col $79.452. Lee strategy with a threshold of 3 has...