Recent authors

A (%)

B (%)

AB (%)

O (%)

Nwangwu

Singh (2015)

Hussain (2014)

Gayatri (2013)

Olajevwo (2013)

Deepa (2011)

Tewodros (2011)

Sing et al. (1995)

24.1

16.1

32.3

16.1

34.6

22.0

23.5

14.3

21

40.9

35.3

40.9

23.1

42.0

21.9

11.1

5.3

13.0

24.2

8.8

3.9

1.0

3.3

0

49.6

25.9

17.7

34.2

38.4

35.0

51.3

13.9