Have Roma (Gypsy) Haplogroups, and/or Blood Types been studied, and recorded?

Question

Have Roma (Gypsy) Haplogroups, and/or Blood Types been studied, and recorded?

Answer 1

Yes, but I can't find any in-depth articles on it just  brief mentions.

"Blood types were used to prove that the Romany, or Gypsies, originally came from the Indian subcontinent, not Europe.'

And,

"ABO blood group distributions closely approximating those of the warrior classes of northern India".

That's all I could find.