Four new companies have been approved to cultivate cannabis for research purposes in Pennsylvania in partnership with the state’s medical schools, according to a TribLive.com report.

Laurel Harvest Labs LLC partnered with Lewis Katz School of Medicine at Temple University in Philadelphia; CannTech PA, LLC partnered with Lake Erie College of Osteopathic Medicine (LECOM) in Erie; Organic Remedies, Inc., partnered with Philadelphia College of Osteopathic Medicine in Philadelphia; and Curaleaf PA, LLC, partnered with The Perelman School of Medicine at the University of Pennsylvania in Philadelphia, the news outlet reported.

Under state law, eight companies—called “clinical registrants”—can grow, process and dispense cannabis for research institutions. The four new licensees bring the total number of clinical registrants to seven, TribLive.com reported.

Pennsylvania launched its medical cannabis research program last summer with the announcement that three partnerships had been approved, including partnerships between Drexel University College of Medicine and Agronomed Biologics LLC, Sidney Kimmel Medical College at Thomas Jefferson University and MLH Explorations LLC, and Penn State College of Medicine and PA Options for Wellness.

The University of Pittsburgh School of Medicine is now the only approved medical school in the program without a clinical registrant partner, TribLive.com reported. Applications for the final clinical registrant will open Feb. 27, according to the news outlet.