Synthesis as per wikipedia means If one reliable source says A, and another reliable source says B, do not join A and B together to imply a conclusion C that is not mentioned by either of the sources. I donot think that mentioning the results of thi study " The study of ABO blood groups of Sainis of Punjab." by SINGH IP, SINGH D available on Pubmed PMID: 13913332 [PubMed - indexed for MEDLINE]amounts to synthesis. It took the ABO blood group testing of Sainis and compare the frequency of blood groups found in other groups/castes of Punjab and neighboring areas. So I donot think that mentioning the findings of this scientific study available on Pubmed is synthesis unless you do not want it to be there for some reason which is hard to understand. I hope your opinion is not biased.