1. Family Caregiving Institute at the Betty Irene Moore School of Nursing, University of California Davis, Sacramento, CA, USA
2. Division of Biostatistics; Department of Public Health Sciences, University of California Davis, Davis, CA, USA
3. Division of Biostatistics, Department of Public Health Sciences, University of California, Davis, Davis, CA, USA
4. Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, Davis, CA, USA