July 11 (Reuters) - Walgreens Boots Alliance Inc  said on Thursday it expanded its collaboration with Kaleo Inc, making the privately held company's epinephrine auto-injector available at the drugstore chain's pharmacies, as supply issues persist for the emergency allergy shots.
   Epinephrine auto-injector makers have been facing a shortage of the devices and the collaboration helps broaden access to Kaleo's treatment for patients with life-threatening allergies, as families prepare for back-to-school season.

(Reporting by Saumya Sibi Joseph in Bengaluru; Editing by Maju
Samuel)
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