 | Survey β Answer questions about your health and about the environment where you live and work. You can take the survey online, on paper (if applicable), or over the phone. |
 | βWristband β Wear a silicone (rubber-like) wristband continuously for 7 days, then mail it back in a postage-paid envelope. |
 | βOPTIONAL Saliva Sample β Collect a saliva sample and mail it back in a postage-paid envelope. |
 | βOPTIONAL Blood and Urine Sample β We may ask some participants to give a small sample of blood and urine at a clinic or location convenient to you. |
 | Follow up surveys β Answer questions from time to time over the next several years about changes to your health or environment. |