Table 1 Search strategy

PubMed

(“Arthritis, Psoriatic”[Mesh] OR “Psoriasis”[Mesh] OR “psoriatic arthritis” OR “psoriasis”) AND (“Ultrasonography”[Mesh] OR “ultrasound” OR “Ultrasonography, Doppler”[Mesh] OR “Doppler” OR “Power doppler” OR “spectral”) AND (“nail” OR “ungueal”)

LILACS

(“Psoríase” or “Psoriasis” or “Arthritis, Psoriatic” or “Artrite Psoriásica”) and (“ultrasonography” or “ultrasound” or “ultrassonografia” or “doppler”) and (“unha” or “nail” or “ungueal”)