TY - RPRT TI - Needle-free epidermal powder immunization. AU - Dexiang Chen AU - Yuh-Fun Maa AU - Joel R Haynes PY - 2002 DO - 10.1586/14760584.1.3.265 UR - https://pubmed.ncbi.nlm.nih.gov/12901567/ ID - 12901567 ER -