function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chamberlin, Joseph Conrad', 1],
    ['Gao, Zhizhong & Hou, Yanmeng & Zhang, Feng', 4],
    ['Hou, Yanmeng & Zhang, Feng', 2],
    ['Hu, Junfang & Zhang, Feng', 3],
    ['Morikawa, Kinichi', 6],
    ['Viana 1, Ana Clara Moreira & Ferreira 1, Rodrigo Lopes', 1],
    ['Yun-Chun LI', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    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);