In 2149, Doctor Phlox attended an IME conference on Tiburon, where he briefly met a member of the Mazarite delegation. Unknown to him at the time, this member was actually a Klingon expert in metagenics research, named Dr. Antaak. The Klingons were not invited to the conference. (ENT: "Affliction")
Background information Edit
T'Lor was established in the script of "The Ship" to be a Tiburonian. 
According to Star Trek: Star Charts (p. 64) and Stellar Cartography: The Starfleet Reference Library ("Stellar Cartography" pp. 28 & 30; "Federation Historical Highlights, 2161-2385"), there was a star system named Tiburon (Omega Fornacis), in which this planet might possibly have been located, in the Beta Quadrant. The primary was a B-class star. According to a map of the Klingon Empire – prepared by the Scribe K'Tark for the Klingon High Council in the Year of Kahless 893 (2366} – Tiburon was identified as a Klingon system. This claim was probably made for propaganda reasons, as Qo'noS claimed "many of the border worlds, such as Organia, that put it at odds with the Federation." In the late 24th century, it was an independent system.