function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chamberlin, Ralph V.', 2],
    ['Chipman, Ariel D. & Dor, Neta & Bonato, Lucio', 1],
    ['Decker, Peter & Reip, Hans Simon & Voigtlaender, Karin', 2],
    ['Hollier, John & Stagl, Verena', 1],
    ['Jonishi, Taro & Nakano, Takafumi', 2],
    ['K. W. Verhoeff', 1],
    ['Newport, George', 1],
    ['Published, First', 23],
    ['Thofern, Detlef & Dupérré, Nadine & Harms, Danilo', 4],
    ['Tran, Binh T. T. & Le, Son X. & Nguyen, Anh D.', 6],
    ['Wood, Horatio C.', 2],
    ['Zarei, Roghaieh & Rahimian, Hassan & Mirmonsef, Hassan', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=47)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);