function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ashrafi, Hossein & Dehghani, Amir & Sari, Alireza', 1],
    ['Bate, Charles Spence', 1],
    ['Han, Qingxi & Keesing, John K.', 1],
    ['Han, Qingxi & Li, Xinzheng', 4],
    ['Mantelatto, Fernando L. & Al, Et', 1],
    ['Purushothaman, P. & Chakraborty, Rekha Devi & Kuberan, G.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=10)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);