Review articles

1. A review of the risk factors associated with juvenile-onset recurrent respiratory papillomatosis: genetic, immune and clinical aspects
2. Clinical practice guidelines in multisystem inflammatory syndrome(MIS-C) related to COVID-19: a critical review and recommendations

Clinical image

1. Jacobsen syndrome with bilateral periventricular white matter lesions

Meta-analysis

1. Diagnostic performance of serum interleukin-6 in pediatric acute appendicitis: a systematic review

Original articles

1. Association between HLA alleles and sub-phenotype of childhood steroid-sensitive nephrotic syndrome
2. Variations in length of stay among survived very preterm infants admitted to Chinese neonatal intensive care units
3. Surgical management in pediatric neuroblastoma diagnosis and treatment: a 20-year, single-center experience
4. Ursodeoxycholic acid prevention on cholestasis associated with total parenteral nutrition in preterm infants: a randomized trial
5. Epidemiology and region-specific risk factors for low Apgar scores in China: a nationwide study

Acknowledgements

1. Tribute to reviewers (January 1, 2021 to December 31, 2021)

Research letter

1. Duplex kidneys and the risk of urinary tract infection in children