Table:
Autism spectrum
Other names	Autism spectrum disorder (ASD), autism spectrum condition (ASC)[1], or simply autism.

Repetitively stacking or lining up objects is associated with autism.
Specialty	Psychiatry
Symptoms	Problems with communication, social interaction, restricted interests, repetitive behavior[2]
Complications	Social isolation, employment problems, family stress, bullying[3]
Usual onset	By the age of 3 years[4]
Risk factors	Advanced parental age, exposure to valproate during pregnancy, low birth weight[2]
Diagnostic method	Based on symptoms[5]
Differential diagnosis	Intellectual disability, Rett syndrome, ADHD, selective mutism, childhood-onset schizophrenia[2]
Treatment	Behavioral therapy,[6] psychotropic medication[7]
Frequency	1% of people[2] (62.2 million 2015)[8]

Given this table, what are the contents in row 6? The cells in a row should be presented in the JSON format of {"row_id":"<row index>", "cell_list":"<a list of cells in this row>"}, e.g., {"row_id":"3", "cell_list": ["xxx", "yyy", "zzz"]}.

The cells in row 6: {"row_id": "6", "cell_list": ['Duration', 'Long-term']}