| Business | Phone |
| Advanced Research 3150 N Republic Blvd, Toledo 43615 | (419) 842-1144 |
| Toledo Community Hosp Oncology 5151 Monroe St # 212e, Toledo 43623 | (419) 843-6147 |
| Peter Hart Research 1232 Flaire Dr, Toledo 43615 | (419) 535-3525 |
| Market Research Of Toledo 3103 Executive Pkwy, Toledo 43606 | (419) 534-4705 |