The North Shore-Long Island Jewish Health System has reached out of New York state for the first time, creating a strategic alliance with the Hackensack University Health Network in New Jersey. The system said the deal establishes its first formal relationship in New Jersey, while giving the Hackensack University Health Network access to New York City and Long Island. Both nonprofits will retain their independence, including boards, management and financial bottom lines. The two organizations hope to create cooperative programs to promote quality and patient safety.