function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Calonje, Michael & Betancur, Julio & Lindstrom, Anders', 1],
    ['Calonje, Michael & Hernández, Jonatan Castro', 2],
    ['DeFilipps, Robert A. & Krupnick, Gary A.', 1],
    ['Flores-Barragan, Miguel Angel & Leon, María Patricia Velasco-de', 1],
    ['Galtier, Jean & Ronchi, Ausonio & Broutin, Jean', 1],
    ['González, José García & Pérez-Farrera, Miguel Á.', 2],
    ['Gutiérrez-Ortega, José Said & Pérez-Farrera, Miguel A.', 1],
    ['Hill, John', 3],
    ['Jarvis, Charlie', 2],
    ['Kvaček, Jiří', 2],
    ['Martinez-Dominguez, Lili & Nicolalde-Morejon, Fernando', 52],
    ['Mille, Christian & Henderson, Rosa C. & Cazères, Sylvie', 2],
    ['Tang, William & Dominguez, Hector Gomez', 2],
    ['Tang, William & Skelley, Paul & Pérez-Farrera, Miguel Angel', 11],
    ['Vovides, Andrew P. & Pérez-Farrera, Miguel Angel', 3],
    ['Other (11)', 11]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=97)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);