Listings >> Emergency >>Hospital ONASSIO +30 210 9493000 Address: 356 Syngrou Str, Kallithea, 17674, Attiki Social Media: Cardiac Surgery Center Rate and write a review Cancel reply Your email address will not be published. Required fields are marked *Your Review Name * Email * Website Your overall rating of this listing: Title of your review: Emergency Hospital Get Listed for Free! Submit your listing from, and benefit from ever-growing audience Get Listed Now! Leoforos Andrea Siggrou 356 Kallithea 176 74 GR Get directions