function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Anh D. Nguyen & Zoltán Korsós & Kuem-Hee Jang & Ui-Wook Hwang', 7],
    ['Borges, Paulo A. V. & Gaspar, Clara', 2],
    ['Bueno-Villegas, Julián & Sierwald, Petra', 1],
    ['Chen, Hui-Ming & Zheng, Chang-Bin & Jiang, Xuan-Kong', 1],
    ['Decker, Peter & Reip, Hans Simon & Voigtlaender, Karin', 2],
    ['Golovatch, Sergei I. & Wesener, Thomas', 2],
    ['Haľkova, Beata & Drabova, Martina & Mock, Andrej', 1],
    ['Iniesta, Luiz Felipe Moretti & Bouzan, Rodrigo Salvador', 1],
    ['Parra-Gómez, Antonio', 2],
    ['Pugh, P. J. A.', 1],
    ['Shelley, Rowland M. & Sikes, Derek S.', 1],
    ['Shelley, Rowland M. & Snyder, Bruce A.', 1],
    ['Snyder, Bruce A.', 1],
    ['Vohland, Katrin & Hamer, Michelle', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=25)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);