Conditions: Chronic Pain
Interventions: Drug: KL0011034 injection; Drug: Alfentanil Hydrochloride Injection
Sponsors: Hunan Kelun Pharmaceutical Co., Ltd.
Not yet recruiting Conditions: Chronic Pain
Interventions: Drug: KL0011034 injection; Drug: Alfentanil Hydrochloride Injection
Sponsors: Hunan Kelun Pharmaceutical Co., Ltd.
Not yet recruiting