Make a Difference, Sign up for a Study Today! Your participation in a clinical research study can make a world of difference for the people who need it most. Help us make a difference in medical science. Enroll in a Study Current Studies Study # 55623 Healthy, Smoker/Non-Smoker Healthy , ages 65 years of age and older years old. Compensation up to Between $705 and $805 (dependent on randomization) This study will consist one screening/dosing, multiple outpatient return visits and follow-up telephone calls See Details Join Waitlist Study # 50223 Healthy, Lactating Women, New Mom Female/Mother , ages 18 - 45 years old. Compensation up to $1,550 This study will consist 2 1/2-day inhouse stay with 2 follow-up phone calls See Details Join Waitlist Study # 50523 Rheumatoid Arthritis A Man or Woman , ages 18 - 70 years old. Compensation up to $3,800 This study will consist 2-day inhouse stay plus multiple returns See Details Join Waitlist Get Started Today Step 1: APPLY Apply New Participants: Please fill out this formReturning Participants or those who have already filled out a form: Call a Recruiting Coordinator at (417) 831-2048. Step 1: APPLY Step 2: ENROLL Enroll Review upcoming studies.Call a Recruiting Coordinator for a pre-screening assessment at (417) 831-2048. Step 2: ENROLL Step 3: PARTICIPATE Participate Learn all about the QPS study process. Step 3: PARTICIPATE Step 4: GET PAID Get Paid Stipends are typically paid five working days after the study completion. Payment is loaded onto a prepaid debit card. Step 4: GET PAID Make a Difference…Make Money Doing It. Fill out an application today!