Attachment: f2salr8k031522.htm

Exhibit 2.1

 

 
 

 

 
 

 

 
 

 

 
 

 

 
 

 

 
 

 

 
 

 

 
 

 

 
 

 

 
 

 

 
 

 

 
 

 

 
 

 

 
 

 

 
 

 

 

 

Exhibit 99.1

 

 

 
 

 

 
 

 

 

 

alrt-20220517.xsd
Attachment: XBRL SCHEMA FILE

alrt-20220517_lab.xml
Attachment: XBRL LABEL FILE

alrt-20220517_pre.xml
Attachment: XBRL PRESENTATION FILE