function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alencar, Isabel D. C. C. & Azevedo, Celso O.', 5],
    ['Lim, Jongok & Lee, Seunghwan', 7],
    ['Lim, Jongok & Shin, Sangchul & Lee, Seunghwan', 3],
    ['Singh, Sudhir & Colombo, Wesley D. & Shreevihar, Santhosh', 5],
    ['Wang, Chung-Hong & He, Jun-Hua & Chen, Xue-Xin', 11]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=31)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 5, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);