function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Gauld, Ian D. & Fernández-Triana, José L.', 1],
    ['Gómez, Isrrael C. & Sääksjärvi, Ilari E. & Puhakka, Liisa', 15],
    ['Hopkins, Tapani & Roininen, Heikki & Noort, Simon van', 13],
    ['Pádua, Diego G. & Fernandes, Daniell R. R. & Araujo, Rodrigo O.', 1],
    ['Rousse, Pascal & Noort, Simon Van', 12],
    ['Varga, Oleksandr', 1],
    ['Zuñiga, Ronald & Hanson, Paul', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=46)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);