<s>[INST] This paper presents data on the distribution of ABO blood types in humans and the relationship between ABO blood type and several diseases. The data are based on a sample of people from the general population in Stockholm, Sweden. There are 5463 individuals in the sample and we have information on their ABO blood type and gender. The distribution of ABO blood types in the sample (from 1998) is presented below:

| Blood Type | Number of People |
| --- | --- |
| A | 2338 |
| O | 1476 |
| B | 703 |
| AB | 946 |

The overall aim of this paper is to analyze the association between ABO blood type and several diseases. We will use the data set to examine if there are any significant differences between the distributions of ABO blood types among people with different diseases.[/INST]