Ovalbumin and cholera toxin delivery to buccal mucus for immunization using microneedles and comparison of immunological response to transmucosal delivery. - Oh YJ; Cha HR; Hwang SJ; Kim DS; Choi YJ; Kim YS; Shin YR; Nguyen TT; Choi SO; Lee JM; Park JH (Drug delivery and translational research, 2021)