Clustering of Intermittent Magnetic and Flow Structures near Parker Solar Probe's First Perihelion-A Partial-variance-of-increments Analysis - Chhiber,R; Goldstein,ML; Maruca,BA; Chasapis,A; Matthaeus,WH; Ruffolo,D; Bandyopadhyay,R; Parashar,TN; Qudsi,R; de,Wit TD; Bale,SD; Bonnell,JW; et al. (ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2020)