function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Azman, B. A. R. & Wongkamhaeng, K. & Dumrongrojwattana, P.', 2],
    ['Bichang’A, Joshua Sese & Kioko, Esther N. & Liu, Hongguang', 1],
    ['Hou, Z. - E. & Li, S.', 1],
    ['Lowry, J. K.', 3],
    ['Lowry, J. K. & Springthorpe, R. T.', 1],
    ['Miyamoto, Hisashi & Morino, Hiroshi', 2],
    ['Myers, A. A.', 1],
    ['Suklom, Anotai & Danaisawadi, Patchara & Wongkamhaeng, Koraon', 1],
    ['Suklom, Anotai & Keetapithchayakul, Tosaphol Saetung', 3],
    ['Thacker, Dimple & Patel, Krupal & Myers, Alan', 2],
    ['Tong, Yan & Hao, Jiasheng & Liu, Hongguang & Li, Shuqiang', 1],
    ['Wongkamhaeng, Koraon & Dumrongrojwattana, Pongrat', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=21)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);