2643276 eLOS extended length of stay 54 2643267 ELOS electro-optical synergy 14 2643273 eLOS extended length of hospital stay 9 2643272 eLOS extended LOS 7 2643268 ELOS estimated length of stay 2 2643265 ELOS European Larynx-Organ preservation Study 2 2643270 eLOS excess LOS 2 2643266 ELOS Electro-optical synergy device 1 2643269 ELOS enzymatically soluble organic substance 1 2643271 ELOS excessive LOS 1 2643274 ELOS extended hospitalization 1 2643275 ELOS extended length of stay on intensive care 1 2643277 ELOS extended postoperative LOS 1 2643279 ELOS extended-state-observer-based LOS 1 2643278 ELOS extra length of stay 1