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BLOODMO85
Month last gave blood after March 1985

Codes and Frequencies



An 'X' indicates the category is available for that sample

00NIUXXX
01JanuaryXXX
02FebruaryXXX
03MarchXXX
04AprilXXX
05MayXXX
06JuneXXX
07JulyXXX
08AugustXXX
09SeptemberXXX
10OctoberXXX
11NovemberXXX
12DecemberXXX
98Unknown-not ascertainedXXX
99Unknown-don't knowXXX