Laryngopharyngeal reflux is not always secondary  to gastroesophageal reflux.
Chong
Vui Heng
VH
D005764:Gastroesophageal Reflux / Q000150:complications; D006801:Humans; D057045:Laryngopharyngeal Reflux / Q000209:etiology*; D029424:Pulmonary Disease, Chronic Obstructive / Q000150:complications*