Our Doctors

Dr. Robertson

Wesley Robertson, M.D., F.A.A.P., J.D.

Dr. Robertson founded Sunshine Valley Pediatrics (SVP) over 25 years ago. A native of California, he attended medical school at the University of Minnesota and then returned to the University of California (Irvine) to complete his medical residency. His interests include tennis, real estate, fitness, and law. He became a member of the Nevada State Bar in 2003. He is the father of four beautiful children. Dr. Robertson speaks some Spanish.

Laura Weidenfeld, M.D., F.A.A.P.

Originally from Brooklyn, New York, Dr. Laura graduated from Tufts University Medical School in Boston. She completed her internship at Columbia Presbyterian in New York City and her medical residency at Children’s Hospital in Los Angeles, California where she received several awards for patient care. After practicing pediatrics in Los Angeles, she relocated to Las Vegas joining SVP where she has practiced for over 10 years. Dr. Laura is married and is the mother of two children.

Dr. Tresa Chakkalakal, M.D., F.A.A.P.

Tresa Chakkalakal, M.D., F.A.A.P.

Dr. Chakkalakal is very outgoing and welcomes her patients to call her “Dr. Tresa”. Dr. Tresa originally trained in obstetrics and gynecology in India. After moving to the United States, she obtained her M.D., became Board Certified by the American Academy of Pediatrics, and started her medical practice in New York. In addition to the clinical practice there, Dr. Tresa was also Chief of House Staff for the Department of Pediatrics at the Brookdale University Hospital Medical Center.

Dr. Helen Yang, M.D., F.A.A.P.

Helen Yang, M.D., F.A.A.P.

Dr. Yang joined Sunshine Valley Pediatrics in September 2012. Originally from Chicago, she received her Undergraduate Degree at Northwestern University and obtained her Medical Degree at the University of Illinois College Of Medicine. Dr. Yang completed her Residency at Advocate Lutheran General Children’s Hospital. She is married and the mother of a young daughter and two sons. She speaks medical Spanish and some Korean.

Las Vegas Pediatrician Dr. Jack Ju

Jack Ju, M.D.

Dr. Jack is a world traveler who was born in Taiwan and moved to Guam at a young age. Dr. Jack earned his undergraduate degree in Biology from The State University of New York at Binghamton. He went on to obtain his Medical Degree at The University of Queensland, based out of both Australia and New Orleans. Dr. Jack speaks Mandarin. In his free time, he enjoys traveling and experiencing foods from different cultures.


All of our physicians are Board Certified in Pediatrics.

All children should be examined at least once yearly throughout their lives. Although children are usually very healthy, an ounce of preventative medicine (including vaccinations) can help keep your child healthy for years to come.

We consider it our privilege to care for your children from birth through age 21.

For the safety of our children, we require a note of authorization from you if someone else will be bringing your child in to be seen. Please ask a staff member how a notarized form can eliminate the need for these notes for an entire year.

Our on-call physicians can be reached throughout the day though by calling 702-363-3000. Please reserve after-hours calls for URGENT and EMERGENCY calls only. Calls regarding dosage or refill of medications should be made during regular office hours or to our non-emergency nurse line at 702-214-0900.

The following symptoms are considered emergent in newborn babies that are less than two months old:
- Fever greater than 100.4 F (Take baby’s temperature rectally if baby feels warm and temperature is normal under the arm).