function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Caballero, Alejandro', 2],
    ['Joshi, Sunil & Amarendra, B. & Mendonce, Viyolla Pavana', 2],
    ['Li, Yuang & Zheng, Xinyi & Wu, San-An', 3],
    ['Powell, Erin C. & Halbert, Susan E. & Deeter, Lily', 1],
    ['Tanaka, Hirotaka', 2],
    ['Williams, D. J.', 4],
    ['Zhang, Jiang-Tao & Wu, San-An', 9]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    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);