Houweling Research Laboratory discovered and produced a dog vaccine that gave a three-year immunity from rabies. The development of the vaccine was later used by other countries, in collaboration with the World Health Organization, on their fight against rabies. Recently, a new Medical Arts Building was added to the main structure of the hospital to further address the growing needs of the surrounding community. The SU Medical Center has collaborative ties with St. Luke's Medical Center. Research and extension Concurrent with its academic undertakings, the university is engaged in collaborative research and community extension programs. From 2000 to 2011, it has been designated as a CHED Zonal Research Center for Region VII, and in 2011, was chosen by the Commission on Higher Education (CHED) as one of few academic institutions to comprise a national research network which entitles the university to receive an annual allocation of P10 million for a three-year period. Selected researches are published in the Silliman Journal, the university's research publication. Foremost among the university's research outputs are those that have been undertaken in the field of Environmental and Marine Sciences, historically spearheaded by the Silliman University Marine Laboratory (SUML) now the Institute of Environmental and Marine Sciences (IEMS). IEMS is a research institute in the field of marine sciences located at Silliman Beach, two kilometers north of the main campus. Established in 1974 through a modest grant from the United Church of Canada, it has produced notable research that are presently being applied in various cooperative projects in different local communities, such as the conservation programs in Sumilon and Apo Island. This research institute also led in the establishment of 20 marine protected areas (MPAs) and has provided assistance to 61 others in the Visayas and Mindanao. For its research and biodiversity conservation efforts, it was recognized by the Commission on Higher Education as the best in research program in the country. In July 2013, Greenpeace an international environmental organization partnered with Silliman University in conducting a reef check at Apo Island to determine the damage on the reef caused by climate change. Other units engaged in either research or extension include the Center for Gender Studies and Development; the Center for Tropical Conservation Studies (CENTROP); the Salonga Center for Law and Development; and the SU-Angelo King Center for Research and Environmental Management (SUAKCREM). Extension projects of the university also include the SU-Affiliated Non-Conventional Energy Center