function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Castro-Huertas, Valentina & Minghetti, Eugenia', 1],
    ['Ferreira, Paulo Sergio Fiuza & Henry, Thomas J.', 5],
    ['Ghahari, H. & F, Amblytylus & R, Atomoscelis & D, Badezorus', 2],
    ['Ghahari, Hassan & Chérot, Frédéric', 3],
    ['Konstantinov, Fedor V. & Neimorovets, Vladimir V.', 6],
    ['Linnavuori, Rauno E.', 5],
    ['Sakenin, H. & Samin, N. & Rastegari, J. & Havaskary, M.', 1],
    ['Yazici, Gülten & Yildirim, Erol', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=25)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);