function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abu-Dannoun, Omar & Katbeh-Bader, Ahmad', 2],
    ['Battiston, Roberto & Correas, José & Lombardo, Francesco', 4],
    ['Ghahari, H. & M. G & R, Blepharopsis & C, Empusa', 3],
    ['Marabuto, Eduardo', 4],
    ['Mohammad, Salwa Kamal & Alla, Sohair Mohammad Gad', 2],
    ['Svenson, Gavin J.', 1],
    ['Walker, Francis', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=17)',
    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);