Childrens Hospital Los Angeles, acknowledged for its leadership in pediatric and adolescent health, signed a sublease at 800 N. Brand Blvd. in Glendale. It will be subleasing Nestle USA Inc.'s 22,930-square-foot space. It will occupy the 20th floor through 2010. The lease is valued at approximately $2.7 million. Wells Real Estate Funds owns the Nestle Building.