TY - RPRT TI - Human beta 2 interferon and B-cell differentiation factor BSF-2 are identical. AU - P B Sehgal AU - L T May AU - I Tamm AU - J Vilcek PY - 1987 DO - 10.1126/science.3492764 UR - https://pubmed.ncbi.nlm.nih.gov/3492764/ ID - 3492764 ER -