function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ashraf, Shazia & Naseer, Arooj & Usman, Muhammad', 2],
    ['Forin, Niccolò & Tatti, Alessia & Vizzini, Alfredo', 3],
    ['Heisecke, Celeste & Barbosa, Jaime Andrés Duque', 1],
    ['Karunarathna, Samantha C. & Priyashantha, K Hasith', 1],
    ['Khalil, Hajra & Ayyub, Misbah & Akram, Aiza', 1],
    ['Khan, Zaman & Izhar, Aiman & Khalid, Abdul Nasir', 1],
    ['Niazi, Muhammad Asif Abdul Rehman & Izhar, Aiman', 1],
    ['Rehman, Amatu & Usman, Muhammad & Afshan, Najam Ul Sehar', 1],
    ['Telfer, Angela C & Young, Monica R & Quinn, Jenna & Perez, Kate', 1],
    ['Zambrano-Forero, Cristian J & Davila-Giraldo, Lina R', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=13)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);