John E. Heffner

No biography available.

Works (6)

Cover of Internal medicine pearls

Internal medicine pearls

Cover of Pulmonary pearls

Pulmonary pearls

Cover of Pulmonary/respiratory therapy secrets

Pulmonary/respiratory therapy secrets

Cover of Pulmonary/Respiratory Therapy Secrets

Pulmonary/Respiratory Therapy Secrets

Cover of Palliative and End-of-Life Pearls

Palliative and End-of-Life Pearls

Cover of Pulmonary/respiratory therapy secrets

Pulmonary/respiratory therapy secrets