function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ali, Muhammad & Ahmed, Khalil & Ali, Shaukat & Raza, Ghulam', 2],
    ['Biranvand, Amir & Tomaszewska, Wioletta & Li, Wenjing', 8],
    ['Coutanceau, Jean-Pierre', 1],
    ['Fallahzadeh, M. & Abdimaleki, R. & Saghaei, N.', 1],
    ['Hesler, Louis S.', 1],
    ['Hesler, Louis S. & Losey, John E. & Allee, Leslie L.', 1],
    ['Hounkpati, Kwevitoukoui & McHugh, Joseph V. & Niang, Abdoul Aziz', 5],
    ['Li, Wenjing & Chen, Bingxu & Huo, Lizhi & Chen, Xiaosheng', 3],
    ['Najajrah, Mohammad H. & Swaileh, Khalid M. & Qumsiyeh, Mazin B.', 3],
    ['Samin, N. & Shojai, M.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=27)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);