function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Adams, Arthur', 3],
    ['Albano, Paolo G. & Bakker, Piet A. J. & Janssen, Ronald', 1],
    ['Fassio, Giulia & Russini, Valeria & Buge, Barbara', 12],
    ['Huang, Shih-I & Huang, Ya-fan', 1],
    ['Huang, Shih-I & Lin, Ming-Hui', 6],
    ['Okutani, Takashi & Tsuchida, Eiji & Fujikura, Katsunori', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=24)',
    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);