Correction: Anti-Influenza Activity of C Fullerene Derivatives. - Masaki Shoji; Etsuhisa Takahashi; Dai Hatakeyama; Yuma Iwai; Yuka Morita; Riku Shirayama; Noriko Echigo; Hiroshi Kido; Shigeo Nakamura; Tadahiko Mashino; Takeshi Okutani; Takashi Kuzuhara (PLoS ONE, 2013)