function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Artand, Saeid & Mehrabi-Koushki, Mehdi & Tabein, Saeid', 6],
    ['Das, Kallol & Ten, Leonid N. & Ban, Jae-Ho & Lee, Seung-Yeol', 1],
    ['Dayarathne, Monika C. & Wanasinghe, Dhanushka N. & Devadatha, B.', 5],
    ['DeVries, Thomas J.', 2],
    ['Hou, Lingwei & Hernandez-Restrepo, Margarita', 13],
    ['Jelínek, Josef Dr.', 2],
    ['Keirnan, Elizabeth C. & Tan, Yu Pei & Laurence, Matthew H.', 5],
    ['Wijayawardene, Nalin N. & Dai, Dong-Qin & Premarathne, Bhagya M.', 45],
    ['Wijesinghe, Subodini N. & Wang, Yong & Zucconi, Laura', 1],
    ['Yasanthika, Erandi & Wanasinghe, Dhanushka N. & Ren, Guang-Cong', 1],
    ['Yuan, Jun & Zeng, Xiang-Yu & Geng, Kun & Wijayawardene, Nalin N.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=83)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);