Jo Ann and Mario, First, let me thank you both for responding. To do this, we need a large sample which I hope the List Family will supply. Second, Mario, you have some great ideas. I didn't ask for age, age when contracted, place of birth, occupation, etc., because I don't want to intrude on anyone's privacy. You are right, our data would have greater standing with this information. However, this is a List Family project, and the family members have to take the lead. As for your assistance and guidance, Mario, I thank you. I'm a novice at the PC and a pilgrim on the PD trail. HELP is my second favorite word! I ask for it often enough. Just ask my kids! You are on my email list! That reminds me, is there anyone else out there who asks the same question over and over again until it sinks in or am I alone on this part of the planet? In all seriousness, I have this gut feeling that, at least for me, this visitor within began his/her journey many, many years ago. I ask everyone to dig for memories. You know, Mario's right. Age now, age at diagnosis, area of birth, and occupation would all contribute to a truer sample. I only know the sample must be large enough to extract enough data. There are ways to say what we want to say without invading our own privacy. As for me, I've written more about myself on this list than I've spoken about or written about during my entire life. Guess I can go a bit farther. E of the headdress ---------------------------------------------------------------------- To sign-off Parkinsn send a message to: mailto:[log in to unmask] In the body of the message put: signoff parkinsn