function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ganeshalingam, Archchana & Daranagama, Dinushani A.', 1],
    ['Liu, Shuoran & Su, Hongyan & Su, Xijun & Zhang, Fa', 1],
    ['Quijada, Luis & Baral, Hans-Otto', 1],
    ['Quijada, Luis & Baral, Hans-Otto & Jaen-Molina, Ruth', 4],
    ['Yang, Yao-Quan & Zhang, Fa & Li, Zheng-Qiang & Zhou, Fa-Ping', 2],
    ['Zhang, Fa & Boonmee, Saranyaphat & Monkai, Jutamart', 1],
    ['Zhang, Xin & Zhang, Fa & Jiang, Lin & Yang, Yao-Quan', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=12)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);