function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Du, Ping & Cao, Tian-Xu & Wu, Ying-Da & Zhou, Meng', 1],
    ['Isaka, Masahiko & Palasarn, Somporn & Sakayaroj, Jariya', 1],
    ['Ji, Xiao-Hong & Wu, Fang & Dai, Yu-Cheng & Vlasak, Josef', 2],
    ['Karunarathna, Samantha C. & Priyashantha, K Hasith', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=5)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 4, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);