function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bueno-Villegas, Julián & Sierwald, Petra', 1],
    ['Duy-Jacquemin, M. Nguyen & Geoffroy, J. - J.', 1],
    ['Duy-Jacquemin, Monique Nguyen', 5],
    ['Enghoff, Henrik', 1],
    ['Golovatch, Sergei I. & Wesener, Thomas', 2],
    ['Huynh, Cuong', 2],
    ['Huynh, Cuong & Veenstra, Anneke A.', 4],
    ['Korobushkin, Daniil I. & Semenyuk, Irina I. & Tuf, Ivan H.', 2],
    ['Likhitrakarn, Natdanai & Golovatch, Sergei I. & Panha, Somsak', 1],
    ['Nguyen Duy-Jacquemin, Monique', 3],
    ['Recuero, Ernesto & Rodríguez-Flores, Paula C. & Giribet, Gonzalo', 1],
    ['Short, Megan & Vahtera, Varpu', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=24)',
    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);