Please answer the following question: Information: - Trauma Center: Under the Knife, known in Japan as , is a simulation game developed and published by Atlus for the Nintendo DS and is the first entry in the "Trauma Center" series. The game was released in Japan on June 30, 2005, in North America on October 4, 2005 and in Europe on April 28, 2006. An enhanced remake for the Wii, titled Trauma Center: Second Opinion (in Japan), was released on November 19, 2006 in North America, December 2, 2006 in Japan, and August 10, 2007 in Europe. The DS version was followed by a direct sequel, "", released in 2008. - The Wii is a home video game console released by Nintendo on November 19, 2006. As a seventh-generation console, the Wii competed with Microsoft's Xbox 360 and Sony's PlayStation 3. Nintendo states that its console targets a broader demographic than that of the two others. , the Wii leads its generation over PlayStation 3 and Xbox 360 in worldwide sales, with more than 101million units sold; in December 2009, the console broke the sales record for a single month in the United States. - The or simply, DS, is a 32-bit dual-screen handheld game console developed and released by Nintendo. The device went on sale in North America on November 21, 2004. The DS, short for "Developers' System" or "Dual Screen", introduced distinctive new features to handheld gaming: two LCD screens working in tandem (the bottom one featuring a touchscreen), a built-in microphone, and support for wireless connectivity. Both screens are encompassed within a clamshell design similar to the Game Boy Advance SP. The Nintendo DS also features the ability for multiple DS consoles to directly interact with each other over Wi-Fi within a short range without the need to connect to an existing wireless network. Alternatively, they could interact online using the now-closed Nintendo Wi-Fi Connection service. Its main competitor was Sony's PlayStation Portable as part of the seventh generation era. - Atlus was founded in April 1986, and existed until it was dissolved in October 2010 by Index Holdings (later Index Corporation). After the dissolution, the name Atlus continued as a brand used by Index on video games until 2013. Atlus, in its current incarnation, was founded as Sega Dream Corporation in September 2013, a new shell corporation established by Sega. In November 2013, Sega Dream was renamed Index Corporation, following the bankruptcy of the original Index Corporation. In April 2014, the contents and solution businesses of Index were spun off as a new company called Index Corporation, while the rest of Index Corporation (formerly Sega Dream) was renamed Atlus. - Trauma Center : Under the Knife 2 ( 2 Kyky Kymei Kadukeusu 2 , lit. '' Medical Emergency : Caduceus 2 '' ) is a simulation game developed for the Nintendo DS and the third in the Trauma Center series . The game is a sequel to Trauma Center : Under the Knife . The character designs of Under the Knife 2 were provided by Masayuki Doi , who worked on Trauma Center : Second Opinion , instead of Maguro Ikehata , who worked on the original Under the Knife . Given the paragraphs above, decide what entity has the relation 'developer' with 'atlus'.
Answer:
trauma center: under the knife 2