| Business | Phone |
| Biotek Micro Media & Supplies 256 Howard Ave, Des Plaines 60018 | (847) 759-0950 |
| R G Assoc 2400 E Devon Ave 155, Des Plaines 60018 | (847) 803-1008 |
| Us Drug Testing Laboratories 1700 S Mount Prospect Rd, Des Plaines 60018 | (847) 375-0770 |
| Pharmaceutical Analytical 200 Howard Ave, Des Plaines 60018 | (847) 759-8505 |