function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bueno-Villegas, Julián & Sierwald, Petra', 1],
    ['Hoffman, Richard L. & Martinez, Daniela & D, Eduardo Florez', 2],
    ['Hoffman, Richard L. & Martinez, Daniela & Florez, Eduardo', 1],
    ['Hollier, John & Stöckli, Eduard & Wesener, Thomas', 17],
    ['John Hollier & Edmund Schiller & Nesrine Akkari', 5],
    ['Keller, Oliver & Dunn, Ann & Soto-Adames, Felipe', 2],
    ['Likhitrakarn, Natdanai & Jirapatrasilp, Parin', 2],
    ['Perez-Gelabert, Daniel E.', 1],
    ['Recuero, Ernesto & Sánchez-Vialas, Alberto', 96],
    ['Riquelme, Francisco & Hernández-Patricio, Miguel', 2],
    ['Shelley, Rowland M. & Smith, Jamie M.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=130)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);