function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Askew, Richard R. & Melika, George & Pujade-Villar, Juli', 1],
    ['Demirel, Mustafa & Tataroğlu, Musa & Katilmiş, Yusuf', 1],
    ['Forshage, Mattias & Bowdrey, Jeremy & Broad, Gavin R.', 4],
    ['IRENE LOBATO-VILA & ALBA SALA-NISHIKAWA & GEORGE MELIKA', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=9)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 4, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);