function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Akrami, Mohammad Ali', 1],
    ['Akrami, Mohammad Ali & Shahedi, Alireza', 1],
    ['Beck, L. & Woas, S.', 1],
    ['Behan-Pelletier, Valerie M. & Lindo, Zoë', 6],
    ['Forsslund, K. - H.', 1],
    ['Hushtan, Habriel H. & Hushtan, Kateryna V. & Glotov, Sergii V.', 2],
    ['K. - H. Forsslund', 2],
    ['Kunst, M.', 1],
    ['Migliorini, Massimo', 1],
    ['Murvanidze, Maka & Mumladze, Levan', 3],
    ['Norton, Roy A. & Ermilov, Sergey G.', 2],
    ['Revelo-Tobar, Harol', 2],
    ['Strenzke, K.', 8],
    ['Weigmann, G. & Miko, L.', 8],
    ['van der Hammen, L.', 5],
    ['Other (3)', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=47)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);