STEVEN JOHN HARTMANN, D.C., ET AL., Appellants, v. NORTHERN SERVICES, INC., n/k/a HEALTH SERVICES MANAGEMENT, INC., ET AL., Respondents. No. C1-96-135.Minnesota Court of Appeals. Filed August 6, 1996. [EDITOR’S NOTE: This case is unpublished as indicated by the issuing court.] This opinion will be unpublished and may not be cited except as provided by Minn. […]