function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ali, Muhammad & Ahmed, Khalil & Ali, Shaukat & Raza, Ghulam', 1],
    ['Ansi, Amin Al & Alkhalaf, Areej A. & Fadl, Hassan', 2],
    ['Biranvand, Amir & Tomaszewska, Wioletta & Li, Wenjing', 2],
    ['Hesler, Louis S. & Perreira, William D. & Yee, Dana Anne', 1],
    ['Hounkpati, Kwevitoukoui & McHugh, Joseph V. & Niang, Abdoul Aziz', 1],
    ['Li, Wenjing & Chen, Bingxu & Huo, Lizhi & Chen, Xiaosheng', 4],
    ['POORANI, J.', 6],
    ['Poorani, J. & Lalitha, N.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=18)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);