3228091 PAPR peak-to-average power ratio 115 3228096 PAPR powered air-purifying respirator 90 3228098 PAPR professionally administered plaque removal 4 3228083 PAPR PAPS reductase 3 3228081 PAPR 3'-phosphoadenosine-5'-phosphosulfate reductase 2 3228090 PAPR peak-to-average power 2 3228088 PAPR pentagon-adjacency penalty rule 2 3228082 PAPR PAPR in the same way as U-RPR 1 3228080 PAPR Patients with COVID-19 Requiring Hospitalization 1 3228084 PAPR peak-to-power-ratio 1 3228085 PAPR powered air purification respirators 1 3228086 PAPR powered air-purifying 1 3228087 PAPR powered air-purifying particulate respirator 1 3228089 PAPR powered APR 1 3228097 PAPR primary-assisted patency rate 1 3228093 PAPR prospective clinical trial 1 3228092 PAPR Proteomic Assessment of Preterm Risk 1 3228094 PAPR pulmonary arterial pressure at rest 1 3228095 PAPR respective acidulated products 1