function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Contreras, Eugenia Fernanda & Coscarón, María Del Carmen', 5],
    ['Coscarón, María Del Carmen', 1],
    ['Coscarón, María Del Carmen & Contreras, Eugenia Fernanda', 1],
    ['Heiss, E. & Moragues, G.', 2],
    ['Heiss, Ernst', 14],
    ['Kment, Petr & Kolínová, Zdislava & Heiss, Ernst', 10],
    ['Krüger, Andreas & Deckert, Jürgen', 1],
    ['Nagashima, Seidai & Shono, Yoshinori', 1],
    ['Pham, Minhlan & Bai, Xiaoshuan & Heiss, Ernst & Cai, Wanzhi', 6],
    ['Swanson, Daniel R. & Taylor, Steven J. & Heads, Sam W.', 1],
    ['Usinger, Robert L.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=43)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);