[1] Cornell Univ, Coll Vet Med, Dept Populat Med & Diagnost Sci, Maddies Shelter Med Program, Ithaca, NY 14853 USA
[2] Cornell Univ, Sect Pain Med, Ithaca, NY 14853 USA
[3] Univ Tennessee, Coll Vet Med, Dept Small Anim Clin Sci, Knoxville, TN 37996 USA
[4] Mississippi State Univ, Coll Vet Med, Dept Clin Sci, Starkville, MS 39759 USA
[5] Texas A&M Univ, Coll Vet Med, Dept Vet Small Anim Clin Sci, College Stn, TX 77843 USA
[6] Univ Florida, Coll Vet Med, Dept Small Anim Clin Sci, Gainesville, FL 32610 USA
[7] Louisiana State Univ, Sch Vet Med, Dept Vet Clin Sci, Baton Rouge, LA 70803 USA
[8] Spay Neuter Assistance Program Inc, Houston, TX 77027 USA
[9] Amer Soc Prevent Cruely Anim Shelter Outreach Ser, Ithaca, NY 14850 USA
[10] Natl Spay Neuter Response Team, Asheville, NC 28801 USA
[11] SPOT Spay Neuter Clin, Natl Spay Neuter Response Team, Cloverdale, IN 46120 USA
[12] No More Homeless Pets, Salt Lake City, UT 84101 USA
[13] City San Jose Anim Care & Serv, San Jose, CA 95111 USA
[14] Shenandoah Valley Spay & Neuter Clin, Harrisonburg, VA 22802 USA
[15] Spay ASAP Inc, Hartland, VT 05048 USA
[16] Feral Cat Spay Neuter Project, Cats Exclusive Vet Ctr, Seattle, WA 98125 USA
[17] Angels Assisi, Roanoke, VA 24016 USA
[18] EmanciPET Spay Neuter Clin, Austin, TX 78703 USA
[19] Univ Penn, Sch Vet Med, Philadelphia, PA 19104 USA
[20] Univ Calif Davis, Sch Vet Med, Ctr Companion Anim Hlth, Koret Shelter Med Program, Davis, CA 95616 USA
[21] Humane Alliance Western N Carolina, Asheville, NC 28801 USA