Skip to content
qps logo

Generic filters
Exact matches only
Search in title
Search in content
Search in excerpt
Contact Us → Apply Now →

  • Home
  • About
    • Staff
    • Safety
    • FAQs
    • Location
    • Blog
  • Studies
    • Available Studies
    • Ongoing Studies
  • Enroll
    • Application
    • Study Process
    • How to Participate
  • Join Our Team
  • Referral Program
  • Contact
qps logo

Generic filters
Exact matches only
Search in title
Search in content
Search in excerpt
Contact Us → Apply Now →

  • Home
  • About
    • Staff
    • Safety
    • FAQs
    • Location
    • Blog
  • Studies
    • Available Studies
    • Ongoing Studies
  • Enroll
    • Application
    • Study Process
    • How to Participate
  • Join Our Team
  • Referral Program
  • Contact

Protected: Mobilized Leukapheresis

Leukopaks, short for leukapheresis packs, are collections of white blood cells (leukocytes) obtained through a specialized medical procedure called leukepheresis. It is a process where blood is drawn from a donor, usually through a vein in the arm, and then passed through a machine that separates and collects the white blood cells. The remaining blood components are returned to the donor.

Are You a Good Fit?

Non-Smokers

Between 18 and 70 years old

Weighs at least 140Lbs

  • Receive up to $300 for your Donation

What are the Time Requirements?

Donors are required to go through the screening process every 90 days. The donation involves up to 6 visits with 2 donations, each can take up to 5 hours

Referral Program

Do not forget our REFERRAL PROGRAM. Earn at least for every new participant you refer who completes a study.*

*No referral bonuses are paid out for outpatient vaccine studies.

All scheduled donations are tentative and subject to change.

We will update the clinical research studies list weekly. Be sure to check with us either by calling or going online. Call (417) 831-2048 or visit 417studies.com for more information. You can also visit the Screening and Recruitment Center located at 2025 W. Sunshine Street, L-109. Office hours are Monday through Friday from 8 a.m. to 5 p.m.

If you have previously submitted an application, call 417-831-2048 to enroll. Or click on the button below to submit your application now.

Apply Online Now

Signup for our newsletter!

"*" indicates required fields

This field is for validation purposes and should be left unchanged.

Important Links

  • Home
  • About
  • Our Studies
  • Ongoing Studies
  • Enroll
  • FAQs
  • Referral Program
  • Join Our Team
  • Blog
  • Contact
  • Privacy Policy

QPS Missouri

QPS Study Campus
1820 W. Mount Vernon Street
Springfield, MO 65802

QPS Screening and Recruitment Center
2025 W. Sunshine Street, L-109
Springfield, MO 65807

Hours of Operation:
Monday – Friday
8 a.m. – 5 p.m.

Call us at 417.831.2048

Employees

  • Employee Portal

qps bird logo outline

Copyright © 2026 QPS Missouri | All Rights Reserved