1 | (JAK Kinases or janus kinases or JAK Kinase or janus kinase or JAK2 Protein Tyrosine Kinase or JAK 2 Protein Tyrosine Kinase or JAK-2 Protein Tyrosine Kinase or v617fjak2 or v617f or Janus Kinase 2).mp. [mp=title, book title, abstract, original title, name of substance word, subject heading word, floating sub-heading word, keyword heading word, organism supplementary concept word, protocol supplementary concept word, rare disease supplementary concept word, unique identifier, synonyms, population supplementary concept word, anatomy supplementary concept word] | 21855 |
2 | (erythrocytoses or erythrocytosis or polycythemia or polycythemias).mp. or Hematocrit/ or exp Blood Cell Count/ or exp Erythrocyte Indices/ | 196065 |
3 | 1 or 2 | 215766 |
4 | exp Blood Donation/ or (blood donor or blood donors or donor, blood or donors, blood).mp. or Blood Donation/ or exp Blood Donors/ | 36878 |
5 | 3 and 4 | 1482 |