function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bordat, Patrice', 1],
    ['Cambefort, Yves & Bordat, Patrice', 1],
    ['Dellacasa, Marco & Dellacasa, Giovanni & Gordon, Robert D.', 20],
    ['Freese, Edwin L. & Veal, Doug A. & Lago, Paul K.', 1],
    ['Hielkema, Auke J. & Hielkema, Meindert A.', 5],
    ['Minor, Pablo', 6],
    ['Skelley, Paul E. & Dellacasa, Marco & Dellacasa, Giovanni', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=35)',
    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);