Possible intrauterine transmission of SARS-CoV-2: Ultrasound findings and viral molecular detection in amniotic fluid Maria Carolina Andrade Maia; Carolina Santos Souza Tavares; Cliomar Alves dos Santos; Paulo Ricardo Martins-Filho;

Tachycardia following Pfizer-BioNTech COVID-19 vaccine Paulo Ricardo Martins-Filho;

No evidence of an increased risk for cardiac complications following mRNA COVID-19 vaccines Paulo Ricardo Martins-Filho; Antônio Carlos Sobral Sousa;