Cellular density‐dependent down‐regulation of <scp>EP</scp>4 prostanoid receptors via the up‐regulation of hypoxia‐inducible factor‐1<i>α</i> in <scp>HCA</scp>‐7 human colon cancer cellsSho Otake, Toshihiko Murayama|Pharmacology Research & Perspectives|2014Cited by 11