OLLI VUOLTEENAHO; JUHANI LEPPÄLUOTO; OLLI VAKKURI; JARO KARPPINEN; MATTI HÖYHTYÄ; NICHOLAS LING (1981). Development and validation of a radioimmunoassay for beta-endorphin-related peptides. , 112(3), 313–321.
doi:10.1111/j.1748-1716.1981.tb06822.x
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