function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Baba, Kikutaro', 1],
    ['Buatip, Somsak & Tan, Siong Kiat', 2],
    ['Filho, Hilton Galvão & Paulay, Gustav & Krug, Patrick J.', 1],
    ['Grzymbowski, Yvonne & Stemmer, Kristina & Wägele, Heike', 1],
    ['Gutiérrez, Manuel Caballer & Ortea, Jesús & Rivero, Nelsy', 4],
    ['Jung, Daewui & Lee, Jongrak & Kim, Chang-Bae', 1],
    ['Mehrotra, Rahul & A. Caballer Gutierrez, Manuel & M. Scott, Chad', 1],
    ['Mille, Christian & Henderson, Rosa C. & Cazères, Sylvie', 1],
    ['Salvador, Xavier & Fernández-Vilert, Robert & Moles, Juan', 3],
    ['Swennen, C.', 1],
    ['Wolff, Vera R. S. & Efrom, Caio F. S. & Aquino, Daniel A.', 1],
    ['Wägele, Heike & Stemmer, Kristina & Burghardt, Ingo', 2],
    ['Zvonareva, Sofya & Kantor, Yuri', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);